Illegal waste site near Kidlington
Illegal waste site near Kidlington
Secured 122 prosecutions, leading to 10 immediate custodial sentences, and shut down 1,205 illegal waste sites.
Supported the Economic Crime Unit to carry out 21 money laundering investigations; secured 6 account freezing orders (£2.9 million frozen); and obtained 13 confiscation orders totalling £1.55 million.
Brought 229 sites into regulation, working with business.
Prevented nearly 34,000 tonnes of waste from being illegally exported.
Responded to 203 illegal dumping incidents.
Background
The Environment Agency is investigating an illegal waste site near the A34 in Kidlington, Oxfordshire. We share the public's disgust at the large-scale illegal waste that has been dumped on the site.
How the Environment Agency responded
In response to evidence from the public, our officers and partner organisations attended the site on 2 July. At this point we confirmed it as a high-risk illegal waste site requiring urgent action.
We immediately began work to prevent further activity on site
We issued a ‘cease and desist’ letter to the landowner on 31st July
When further dumping occurred, we secured a court order to close the site to prevent more waste from being illegally tipped. This was issued by the court on 23 October.
Following that order, we closed access to the site and there has been no further dumping on the site.
Unfortunately, the majority of the waste was tipped before we became aware. Once we were notified, we acted swiftly.
Who we are working with
We're working closely with our partners to tackle this incident head-on. Multi-agency coordination is essential in situations like this, and the Environment Agency is overseeing the joint response. We have been working together on the response and on 19 November we convened a multi-agency group which included Oxfordshire County Council, Cherwell District Council, Thames Valley Police, Fire and Rescue service and National Highways. This ensures a unified approach to protecting the local environment and addressing community concerns.
The group has now transitioned to a Recovery Co-ordination Group who will continue to work closely together to ensure the waste removal is well co-ordinated.
The criminal investigation
The Environment Agency’s investigation is being led by its National Environmental Crime Unit, which is seeking to find those responsible for the offending, hold them to account and deliver justice for the local community.
On Tuesday 25 November, an individual was arrested in connection with illegal waste dumping at the Kidlington site. For more information please visit: Individual arrested in connection with Kidlington illegal waste dumping - GOV.UK
How we are preventing waste from entering the river
We completed construction of a barrier on 28 November. The barrier is formed of jumbo sandbags between the waste and the river and 150 m of fencing. While the risk of the waste entering the river is very low, the barrier has been installed as a precaution to protect the environment and prevent unauthorised access to the active crime scene. Prior to this a boom was installed in the ditch as a temporary measure to help prevent waste material flowing downstream.
In January and February 2026, water levels on and around the waste site rose as expected. We have checked levels and made sure that our Jumbo sandbags and the Heras Fencing is working well and remains effective at preventing waste from entering the River Cherwell. We will continue to monitor the situation.
Managing fire risk
We are working in partnership with the Oxfordshire Fire and rescue service (FRS) to manage and understand fire risk.
This includes the FRS carrying out drone surveys for surface temperature and the EA carrying out sub-surface temperature monitoring each week.
New information and advice from the Fire and Rescue Services has indicated the increased possibility of a fire on site. This could have widespread impacts on the community, including closing the A34 major highway, raising air quality issues from the smoke, and interrupting electrical supplies.
The scale of this fire risk sets this case apart from other illegal waste dumps in England and presents an overriding public imperative. As such, an exceptional decision has been made to progress works to entirely clear the site of waste.
Flood risk and the waste
Map showing the approximate location of the flood walls and embankments that reduce flood risk to properties in Kidlington. Image courtesy of Environment Agency.
The waste pile sits within a large area of floodplain, which can store a substantial volume of water during periods of heavy rain.
We have carried out a detailed flood risk assessment to understand any changes in water levels due to the illegal waste and have determined that there will not be any increased flood risk to local properties.
The existing raised flood defence that reduces the flood risk to some properties in Kidlington is located on the eastern side of the town, and the waste site is located east of the flood defence.
Our analysis has shown that flood water would increase approximately 2.5cm in the floodplain close to the waste site during a major flood. During a flood of this scale, the height of the flood water against the flood wall would be 30cm below the top of the flood wall. Therefore, a 2.5cm increase in flood level close to the waste site is not expected to increase flood risk to properties in Kidlington.
To check if there is a flood alert or warning for the river in this area please follow the link flood alert for the River Cherwell(External link) .
How the waste will be cleared up
Advice from the Fire and Rescue Services has indicated the increased possibility of a fire on site. This could have widespread impacts on the community, including closing the A34 major highway, raising air quality issues from the smoke, and interrupting electrical supplies. The scale of this fire risk sets this case apart from other illegal waste dumps in England and presents an overriding public imperative.
The Environment Agency is not legally responsible for clearing illegal waste, and is not funded to do so. While the organisation continues to support the principle that the criminals responsible should cover the costs of clearance, it retains the power to take action in wholly exceptional circumstances.
In Kidlington, we expect to fund the clearance efforts through making efficiencies in its operations, without impacting or scaling back any other services. However, we are not funded to clear up waste sites nationally and will only make these decisions under truly exceptional circumstances.
Clearance will not be a quick process as we have to ensure this vast amount of waste is handled correctly, moved to the right facilities and is done so without causing further damage to the environment. Further details on the timeframe for clearance will be set out shortly.
Further information can be found here: https://www.gov.uk/government/news/clearance-work-to-begin-at-kidlington-waste-dump
When clearance will start
In January 2026 we started the necessary site preparation ready for clearance. Scoping work to lay access tracks for heavy vehicles has begun.
Due to the continued heavy rainfall across the catchment clearance is likely to begin in April. We will continue to monitor the situation and will act as soon as the conditions improve. The prolonged wet weather has significantly affected ground conditions, with saturated soils and standing water reducing the stability needed for vehicle movements and safe loading operations. Access routes that are normally suitable for heavy plant and haulage vehicles have become waterlogged, increasing the risk of equipment becoming bogged down.
Contract for waste removal
The Environment Agency has decided to directly award the waste removal contract to Acumen Waste Services Limited at the illegal waste site in Kidlington. Acumen have significant experience of this work and have worked with the Environment Agency at Hoads Wood in Kent(External link). The contract date date is 19 January 2026.
The supplier will provide a full end-to-end waste management service, including site preparation, waste characterisation, segregation, safe handling, loading, transport, and disposal at appropriately permitted facilities. For full details please visit the contract transparency notice on Kidlington Waste Clearance - Find a Tender(External link).
Preliminary work to enable removal of waste
Providing safe and secure access.
Work has begun to lay tracks for heavy vehicle access. Prolonged wet weather in January and February 2026 significantly affected ground conditions, with saturated soils and standing water reducing the stability needed for vehicle movements and safe loading operations. Access routes that are normally suitable for heavy plant and haulage vehicles have become waterlogged, increasing the risk of equipment becoming bogged down.
Vegetation work
On 7 January 2026 Oxfordshire County Council Tree Service began work to prepare the site entrance for waste removal. The work involved removing 7 small trees from the entrance to the site. A few additional trees were then removed once the contractor had assessed the site entrance.
This work is needed to ensure the safety of those entering and leaving the site. It has been carried out to avoid the bird nesting season, and to ensure that restrictions to protect nesting birds do not cause delays once the waste removal begins.
While we aim to avoid removing trees wherever possible, it is needed here, to create safe, clear vision for slow moving vehicles leaving the site and joining traffic once the official removal of waste begins.
The team had previously surveyed the trees to make sure they were only removing necessary trees. Most of the trees are less than 15 cm in diameter. Two of the trees removed had unfortunately already been damaged during the illegal waste activity.
Oxfordshire County Council’s Tree Policy is to plant 2 standard trees to replace each tree felled that is greater than 15cm stem diameter.
Further vegetation will need removing from site. The trees and shrubs to be removed are likely to have been affected by the waste, for example the waste may be stopping water and nutrients from getting to the roots, or they may have absorbed pollutants.
The majority of trees are young and Oxfordshire County Council are checking for any Tree Preservation Orders. We will pollard any willows to give them the opportunity to recover naturally.
Traffic management
The contractor, working with partners from Oxfordshire County Council, has put into place a traffic management plan to minimise disruption to local road users.
Continued waste sampling in several locations.
Pits are being excavated at different depths to get a cross section of the waste materials. We will use this sampling to ensure it can be removed safely and sent to the appropriate legal waste disposal facilitates.
Site compound and welfare facilities set up.
Acumen are preparing for setting up the site compound and welfare facilities for site-based staff.
The site remains securely closed with 24 hour surveillance taking place.
Footpath closure
In the interests of public safety, Oxfordshire County Council have temporarily closed Footpath 9 [237/9] from the Bicester Road, Gosford, to the East side of the A34, due to the illegal waste deposit. A Temporary Traffic Regulation Order is being made to implement the temporary closure and will operate from 9 December for an estimated duration of 6 months. The estimated duration is for the maximum duration of a Temporary Traffic Regulation Order on a footpath, which is 6 months. There is no available diversion route, but emergency services will still be able to access the footpath if required.
![Map showing the location of footpath 9 [237/9] from the Bicester Road, Gosford, to the East side onf the A34](https://s3-eu-west-1.amazonaws.com/ehq-production-europe/013837e741c340b2be43934f7b521b9bec51caf1/original/1764088119/df03ff4420e2686756ebc459473481ec_Footpath%20closure%2019112025.png?1764088119)
Myth busting
There have been some false reports in the media and online about some of our response. We’d like to set the record straight on this:
"All EA did was put a sign on the gate. It has been too slow to find the culprits." Not true. When the site was reported to the Environment Agency, we launched a criminal investigation to find those responsible, closed the site to prevent further dumping and continue to monitor the area for environmental harm.
"Dumping continued after we closed the site on 23 October." Not true. We have no evidence of more waste dumped at the site since 1 October.
“EA is too busy to deal with this among all its other work." Not true. We have the resources, expertise and determination to deal with this situation effectively. We have stopped activity at 743 illegal waste sites in the past year.
Some common questions we have been asked:
Why are you not calling this fly tipping?
It is clear from the waste on site that is has been through a mechanical treatment process and is not waste dumped by opportunists. The way in which it has been dumped suggests it is organised criminality and will be investigated as such by our National Environmental Crime Unit.
Why did you only start investigating when the media got involved?
This is not true. We started our investigation in July before news of the site reached the media in October.
Why can’t you fine those you believe to be involved immediately?
Civil sanctions are generally not appropriate where the offending is deliberate. Due to the nature of how the waste has been deposited it appears to have been a deliberate act and we are therefore pursuing a criminal investigation.
Investigations potentially involving a network of offenders can be complex and take time. We have specialist resources assigned to the investigation, both from the EA and partner organisations. We must follow all lines of enquiry to present a strong case to court, who make decisions based on the evidence, to get the best outcome for the taxpayer.
Why didn’t you act sooner?
We were on site within days of the site being reported and immediately confirmed it as a high-risk illegal waste site and went on to take urgent action. While we act immediately, we also rely on information from the public to alert us to illegal waste sites and the quicker we are made aware the quicker we can act.
Our wider work against waste crime
In 2024/25 we:
How you can help us
We understand people are concerned about the impacts of this high-risk illegal waste site and are keen to help in any way they can. We share these concerns and are horrified how these criminals have impacted the local environment.
It is essential that people do not attend the site, as you will be in breach of the restriction order and will be placing yourself and our investigations at risk. Our specialist officers are carrying out an extensive sampling process to establish what substances are present, and as a restricted site, nobody can enter the land without our permission for at least 6 months.
Information from members of the public is critical. Please call our free 24 hour incident hotline on 0800 807060 if you have any information related to this incident. You can also report information to Crimestoppers on their website.
Water sampling results
- "The following compounds were identified using the NLS Screening database in combination with the National Institute of Standards and Technology Library (NIST) and have a Spectral Fit of >80%"
- "The following compounds were identified using the NLS Screening database in combination with the National Institute of Standards and Technology Library (NIST) and have a Spectral Fit of <80%"
- "The following compounds were identified using the National Institute of Standards and Technology Library (NIST) and have a Spectral Fit of >80%"
- "The following compounds were identified using the National Institute of Standards and Technology Library (NIST) and have a Spectral Fit of <80%"
- "The following compounds were identified using the NLS Screening database in combination with the National Institute of Standards and Technology Library (NIST) and have a Spectral Fit of >80%"
- "The following compounds were identified using the NLS Screening database in combination with the National Institute of Standards and Technology Library (NIST) and have a Spectral Fit of <80%"
- "The following compounds were identified using the National Institute of Standards and Technology Library (NIST) and have a Spectral Fit of >80%"
- "The following compounds were identified using the National Institute of Standards and Technology Library (NIST) and have a Spectral Fit of <80%"
- "The following compounds were identified using the NLS Screening database in combination with the National Institute of Standards and Technology Library (NIST) and have a Spectral Fit of >80%"
- "The following compounds were identified using the NLS Screening database in combination with the National Institute of Standards and Technology Library (NIST) and have a Spectral Fit of <80%"
- "The following compounds were identified using the National Institute of Standards and Technology Library (NIST) and have a Spectral Fit of >80%"
- "The following compounds were identified using the National Institute of Standards and Technology Library (NIST) and have a Spectral Fit of <80%"
- "The following compounds were identified using the NLS Screening database in combination with the National Institute of Standards and Technology Library (NIST) and have a Spectral Fit of >80%"
- "The following compounds were identified using the NLS Screening database in combination with the National Institute of Standards and Technology Library (NIST) and have a Spectral Fit of <80%"
- "The following compounds were identified using the National Institute of Standards and Technology Library (NIST) and have a Spectral Fit of >80%"
- "The following compounds were identified using the National Institute of Standards and Technology Library (NIST) and have a Spectral Fit of <80%"
Water Quality Monitoring
Water quality monitoring of the River Cherwell
We have been carrying out water quality sampling of the River Cherwell to check for potential impacts of run-off or leaching from the waste. This is additional to the routine sampling the Environment Agency carries out on the River Cherwell.
We aim to carry out weekly water quality monitoring subject to weather conditions and in response to any emerging evidence. Due to the recent rainfall in January and February 2026, conditions on site have meant that it has not been possible to gain weekly water samples. This is because the locations where we need to take representative water samples are not accessible. We know that when water levels are high, we are not likely to gain meaningful data in relation to Kidlington due the high level of dilution.
We will continue to monitor for signs of pollution from the waste and will update the information on this site as and when it becomes available.
Our analysis has been reviewed by specialists in toxicology. We know that there are many potential sources of substances found in water courses, including run off from roads, agriculture, the water industry, other industries and naturally occurring substances. We know that like many of our rivers the River Cherwell has its challenges with the water body classified as having a Moderate ecological status. Information is available here: Catchment Data Explorer: Cherwell (Bletchingdon to Ray) Water Body
Water quality samples includes an assessment using the gas chromatography-mass spectrometry (GCMS) screening technique: Water quality monitoring data GC-MS and LC-MS semi-quantitative screen.
There are 2 substances identified as being of risk to the environment following a comparison of high or moderate toxicity chemicals to available Environmental Quality Standard (EQS) and Predicted No-Effect Concentration (PNEC). The 2 substances identified as of risk are Triphenyl phosphate and Flufenacet and are endocrine disruptors. However, these are present in both the upstream and downstream samples at similar levels.
We will continue to monitor and we will make sample results available as and when the analysis is complete. https://environment.data.gov.uk/catchment-planning/WaterBody/GB106039037432
Analytical results from samples taken 14 January 2026
Our assessment of samples taken on 14 January 2026 shows no significant increase in the range of chemicals in the ingress and downstream samples or in the concentrations downstream compared to upstream. They include chemicals that are found in other English waterways.
This data includes that obtained by using the GC-MS analytical technique: further guidance on this is available here: Water quality monitoring data GC-MS and LC-MS semi-quantitative screen
Disclaimer for GCMS Results: All results are an approximate concentration. Where accreditation is claimed this is only for the identification of the substance and not the quantified amount.
The compounds identified in the GCMS results fit into one of four criteria, which can be pulled from the original dataset on MIDAS if required:
Samples were taken from the following locations:
Sample | Location (NGR) |
U/S Tributary 1 (Sample 1) | SP 50747 14126 |
U/S Tributary 2 (Sample 2) | SP 50764 13829 |
Ingress (Sample 3) | SP 50791 13850 |
D/S River Cherwell 1 (Sample 3) | SP 50916 13798 |
U/S = Upstream of the waste
D/S = Downstream of the waste
Waste = Sample taken from run-off/standing groundwater that has collated around the waste site boundary
NGR = National Grid Reference
Due to site flooding, samplers were unable to access the waste and D/S 2 sampling locations as they had done in previous weeks.
Determinand / Compound Name | U/S 1 (Sample 1) | U/S 2 (Sample 2) | Ingress (Sample 3) | D/S 1 (Sample 5) | Unit |
Ammonia un-ionised as N | <0.00018 | <0.00034 | <0.00029 | <0.00036 | mg/l |
Ammoniacal Nitrogen as N | <0.03 | <0.03 | <0.03 | <0.03 | mg/l |
BOD : 5 Day ATU | <3 | <3 | <3 | <3 | mg/l |
Chemical Oxygen Demand :- {COD} | 11 | 10 | 11 | 11 | mg/l |
Chloride | 39 | 34 | 38 | 35 | mg/l |
Conductivity at 25 C | 586 | 562 | 378 | 565 | uS/cm |
Nitrite as N | 0.014 | 0.014 | 0.013 | 0.014 | mg/l |
Nitrogen, Total Oxidised as N | 6.6 | 7.1 | 6.5 | 7.1 | mg/l |
Orthophosphate, reactive as P | 0.14 | 0.088 | 0.071 | 0.093 | mg/l |
Oxygen, Dissolved, % Saturation | 86.2 | 95.5 | 94.4 | 96.7 | % |
pH | 7.67 | 7.94 | 7.9 | 7.97 | PHUNITS |
Salinity : In Situ | 0.28 | 0.27 | 0.28 | 0.37 | ppt |
Solids, Suspended at 105 C | <6 | 11 | <6 | 12 | mg/l |
Temperature of Water | 5 | 5.2 | 4.5 | 5.3 | CEL |
Aluminium | 0.28 | 0.35 | 0.21 | 0.82 | mg/l |
Barium | 0.015 | 0.014 | 0.012 | 0.012 | mg/l |
Calcium | 84 | 82 | 84 | 83 | mg/l |
Copper |
|
|
| 0.01 | mg/l |
Iron | 0.41 | 0.62 | 0.33 | 0.64 | mg/l |
Magnesium | 4.9 | 4.8 | 4.8 | 5 | mg/l |
Manganese |
| 0.011 |
| 0.016 | mg/l |
Potassium | 4.1 | 3.6 | 3.8 | 3.6 | mg/l |
Sodium | 22 | 20 | 22 | 20 | mg/l |
Strontium | 0.23 | 0.21 | 0.22 | 0.21 | mg/l |
Zinc | 0.005 | 0.006 | 0.005 | 0.012 | mg/l |
1,1-Dimethyl-3-chloropropanol |
| 0.016 |
|
| ug/l |
1,3-Benzenediol, monobenzoate |
| 0.013 |
|
| ug/l |
13-Docosenamide, (Z)- |
|
| 1 |
| ug/l |
1-Butanol, 2,3-dimethyl- | 0.087 | 0.316 |
| 0.085 | ug/l |
1-Pentene, 4,4-dimethyl- | 0.016 |
|
|
| ug/l |
2-(4'-Methoxyphenyl)-2-(3'-methyl-4'methoxyphenyl)propane |
|
| 0.071 |
| ug/l |
2,2,4-Trimethyl-1,3-pentanediol diisobutyrate |
|
| 0.049 |
| ug/l |
2,4,6-Trimethyl-1-nonene |
|
| 0.081 |
| ug/l |
2,4,7,9-Tetramethyl-5-decyne-4,7-diol | 0.295 | 0.402 | 0.346 | 0.401 | ug/l |
2-Butanol, 2,3-dimethyl- |
| 0.188 |
|
| ug/l |
2-Ethylhexanoic acid |
| 0.172 |
|
| ug/l |
3-Buten-2-one, 3-methyl- |
|
|
| 0.063 | ug/l |
3-Hexanone, 2,5-dimethyl- | 0.014 |
|
|
| ug/l |
3-Pentanone | 0.018 | 0.02 | 0.027 |
| ug/l |
3-Penten-2-one | 0.045 |
|
|
| ug/l |
4-Cyanocyclohexene |
| 0.036 |
|
| ug/l |
4H-1,2,4-Triazol-4-amine |
|
| 0.045 |
| ug/l |
Butyl aldoxime, 3-methyl-, syn- |
| 0.062 |
|
| ug/l |
Caffeine | 0.057 | 0.053 | 0.061 | 0.071 | ug/l |
Caprolactam |
| 0.779 |
| 0.336 | ug/l |
Decane, 2,2,8-trimethyl- | 0.013 |
|
|
| ug/l |
Dimethyl phthalate |
|
|
| 0.07 | ug/l |
Diphenyl sulfone |
| 0.007 |
|
| ug/l |
Ethanone, 1,1'-(1,4-phenylene)bis- |
| 0.62 | 0.572 |
| ug/l |
Ethanone, 1-[4-(1-hydroxy-1-methylethyl)phenyl]- |
| 0.097 | 0.169 |
| ug/l |
Ethanone, 2,2-dimethoxy-1,2-diphenyl- |
|
| 0.069 | 0.054 | ug/l |
Fluoranthene |
| 0.003 |
|
| ug/l |
Hexamethoxymethylmelamine | 0.827 | 0.655 |
| 0.929 | ug/l |
Hexane, 3,3-dimethyl- | 0.015 |
|
|
| ug/l |
meso-3,4-Hexanediol |
| 0.062 |
|
| ug/l |
N,N-Diethyl-m-toluamide |
| 0.011 | 0.101 |
| ug/l |
n-Hexadecanoic acid | 0.091 |
| 0.404 | 0.269 | ug/l |
Octadecanoic acid | 0.03 | 0.094 | 0.17 | 0.096 | ug/l |
Octan-2-yl palmitate |
|
| 0.06 |
| ug/l |
Propyzamide | 0.032 | 0.04 | 0.046 | 0.036 | ug/l |
Sulfurous acid, 2-ethylhexyl hexyl ester |
| 0.024 | 0.026 |
| ug/l |
Supraene |
| 0.085 |
|
| ug/l |
Tri-(2-chloroethyl) phosphate |
| 0.076 | 0.078 | 0.124 | ug/l |
Tri-allate |
|
|
| 0.012 | ug/l |
Triethyl Citrate |
| 0.403 |
|
| ug/l |
Trifluoroacetic acid, 2-tetrahydrofurylmethyl ester |
|
|
| 0.045 | ug/l |
Undecane, 4,6-dimethyl- | 0.034 |
|
|
| ug/l |
Use limitation statement
There are no public access constraints to this data. Use of this data is subject to the licence identified.
Licence
Attribution statement
© Environment Agency copyright and/or database right 2025. All rights reserved.
Analytical results from samples taken 5 January 2026
Our assessment of samples taken on 5 January 2026 has identified some chemicals present in the River Cherwell at negligible levels downstream of the waste that are not found upstream. We cannot be certain if they are from the waste pile or another source and they include chemicals that are found in other English waterways. Any impacts on the environment are negligible.
This data includes that obtained by using the GC-MS analytical technique: further guidance on this is available here: Water quality monitoring data GC-MS and LC-MS semi-quantitative screen
Disclaimer for GCMS Results: All results are an approximate concentration. Where accreditation is claimed this is only for the identification of the substance and not the quantified amount.
The compounds identified in the GCMS results fit into one of four criteria, which can be pulled from the original dataset if required:
Samples were taken from the following locations:
Sample | Location (NGR) |
U/S Tributary 1 (Sample 1) | SP 50747 14126 |
U/S Tributary 2 (Sample 2) | SP 50764 13829 |
D/S River Cherwell 1 (Sample 3) | SP 50916 13798 |
D/S River Cherwell 2 (Sample 4) | SP 50943 13253 |
U/S = Upstream of the waste
D/S = Downstream of the waste
Waste = Sample taken from run-off/standing groundwater that has collated around the waste site boundary
NGR = National Grid Reference
Determinand / Compound Name | U/S 1 | U/S 2 | D/S 1 | D/S 2 | Unit |
pH | 7.41 | 8.13 | 8.11 | 8.16 | PHUNITS |
Temperature of Water | 2.4 | 2.5 | 2.9 | 2.6 | CEL |
Conductivity at 25 C | 731 | 681 | 693 | 683 | uS/cm |
BOD : 5 Day ATU | <3 | <3 | <3 | <3 | mg/l |
Chemical Oxygen Demand :- {COD} | 15 | <10 | <10 | <10 | mg/l |
Ammoniacal Nitrogen as N | <0.03 | <0.03 | <0.03 | <0.03 | mg/l |
Nitrogen, Total Oxidised as N | 1.7 | 7.8 | 7.8 | 7.8 | mg/l |
Nitrite as N | 0.012 | 0.012 | 0.012 | 0.011 | mg/l |
Ammonia un-ionised as N | <0.00008 | <0.00032 | <0.00032 | <0.00032 | mg/l |
Solids, Suspended at 105 C | <6 | 6.5 | 6.7 | 6.5 | mg/l |
Chloride | 51 | 38 | 38 | 38 | mg/l |
Orthophosphate, reactive as P | 0.063 | 0.081 | 0.082 | 0.083 | mg/l |
Visible oil or grease, significant trace: Present/Not found (1/0) |
| Not found | Not found | Not found | N/A |
Salinity : In Situ |
| 0.33 | 0.34 | 0.33 | ppt |
Oxygen, Dissolved, % Saturation | 39.2 | 95.9 | 94.1 | 96.9 | % |
Sodium | 29 | 24 | 23 | 23 | mg/l |
Magnesium | 5.3 | 5.8 | 5.7 | 5.8 | mg/l |
Aluminium | 0.055 | 0.16 | 0.28 | 0.19 | mg/l |
Potassium | 4.2 | 4.3 | 4.4 | 4.2 | mg/l |
Calcium | 110 | 110 | 100 | 110 | mg/l |
Manganese | 0.059 | 0.013 | 0.016 | 0.017 | mg/l |
Iron | 0.10 | 0.26 | 0.32 | 0.34 | mg/l |
Copper |
|
| 0.0095 |
| mg/l |
Zinc |
|
| 0.0088 |
| mg/l |
Strontium | 0.36 | 0.25 | 0.25 | 0.25 | mg/l |
Barium | 0.019 | 0.011 | 0.012 | 0.012 | mg/l |
(E)-9-Octadecenoic acid ethyl ester |
|
|
| 3.2 | ug/l |
.beta.-Guanidinopropionic acid |
| 0.013 |
|
| ug/l |
1,1-Dimethyl-3-chloropropanol |
| 0.014 |
|
| ug/l |
1,2-Benzenediol, o-(3-bromobenzoyl)-o'-(2,3,4-trifluorobenzoyl)- |
|
| 0.039 |
| ug/l |
1,3-Dimethyl-5-pylazolyl-2,4-dichlorobenzoate | 0.031 | 0.033 | 0.02 |
| ug/l |
1H-Pyrazole, 4,5-dihydro-5-methyl- |
|
|
| 0.064 | ug/l |
1-Hydroxy-3-methoxy-6-methylanthraquinone, TMS derivative |
|
| 0.061 |
| ug/l |
1-Propene-1,2,3-tricarboxylic acid, tributyl ester | 0.012 |
| 0.016 |
| ug/l |
2,2,4-Trimethyl-1,3-pentanediol diisobutyrate | 0.02 |
| 0.023 | 0.058 | ug/l |
2,4,7,9-Tetramethyl-5-decyne-4,7-diol | 0.285 | 0.225 | 0.277 | 0.206 | ug/l |
2,5,8-Triphenyl benzotristriazole |
|
|
| 0.015 | ug/l |
2-{2-[2-(Acryloyloxy)-1-methylethoxy]-1-methylethoxy}-1-methylethyl acrylate |
|
|
| 0.074 | ug/l |
2-Ethylhexanal ethylene glycol acetal |
| 0.028 |
|
| ug/l |
2-Pentene, 4,4'-oxybis- | 0.215 | 0.266 |
|
| ug/l |
2-Propenoic acid, (1-methyl-1,2-ethanediyl)bis[oxy(methyl-2,1-ethanediyl)] ester |
|
|
| 0.014 | ug/l |
2-Propenoic acid, 2-methyl-, 1-methylbutyl ester | 0.259 | 0.307 | 0.131 | 0.158 | ug/l |
2-Pyrrolidinone, 1-butyl- |
|
|
| 0.065 | ug/l |
3,4-Dihydroxymandelic acid, 4TMS derivative |
| 0.016 |
|
| ug/l |
3,4-Hexanedione, 2,2,5-trimethyl- |
| 0.016 |
|
| ug/l |
3-Acetyl-2,5-dimethyl furan | 0.015 |
|
|
| ug/l |
3-Hexanol, 4-methyl- |
| 0.13 |
|
| ug/l |
3-Hexanone |
| 0.012 |
|
| ug/l |
3-Hexanone, 2,5-dimethyl- |
| 0.021 | 0.016 |
| ug/l |
3-Penten-2-one | 0.11 | 0.123 | 0.05 |
| ug/l |
3-Penten-2-one, (E)- |
|
|
| 0.107 | ug/l |
4-(7-Methyloctyl)phenol |
|
| 0.011 |
| ug/l |
4-fluorophenyl 4-(4-pentylcyclohexyl)benzoate |
|
| 0.017 |
| ug/l |
4-Hydroxy-2-methylacetophenone |
|
|
| 0.018 | ug/l |
9,12-Octadecadienoic acid (Z,Z)- |
|
|
| 4 | ug/l |
9-Octadecenoic acid |
|
|
| 28 | ug/l |
Acetic acid, 3-acetoxy-1-ethyl-2-nitropentyl ester | 0.04 |
|
|
| ug/l |
Benzene, (trimethoxymethyl)- |
|
|
| 0.025 | ug/l |
Benzophenone |
|
|
| 0.11 | ug/l |
Bicyclo[4.1.0]heptane, 7-methylene- |
|
|
| 1.1 | ug/l |
Bisphenol A | 0.07 |
| 0.065 |
| ug/l |
Butane, 2-chloro-2-methyl- |
|
|
| 0.089 | ug/l |
Butanoic acid, 2,3-dimethyl-, methyl ester |
|
|
| 0.026 | ug/l |
Butanoic acid, 2-methyl- |
|
|
| 0.024 | ug/l |
Butanoic acid, 3-methyl- |
|
|
| 0.047 | ug/l |
Caffeine | 0.019 | 0.07 | 0.076 | 0.467 | ug/l |
Caprolactam | 0.195 |
|
|
| ug/l |
Carbamazepine |
| 0.039 | 0.056 | 0.031 | ug/l |
cis-9-Octadecenoic acid, propyl ester |
|
|
| 1.6 | ug/l |
Crotamiton |
| 0.024 | 0.031 |
| ug/l |
Cyclopenta[g]-2-benzopyran, 1,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethyl- |
| 0.015 | 0.018 | 0.015 | ug/l |
Decane, 2,4-dimethyl- |
|
| 0.017 | 0.017 | ug/l |
Diphenyl ether |
|
|
| 0.005 | ug/l |
Diphenyl sulfone | 0.03 | 0.013 | 0.015 |
| ug/l |
Dodecanoic acid |
|
|
| 0.146 | ug/l |
Ethanone, 1-(2-hydroxy-5-methylphenyl)- |
| 0.012 |
|
| ug/l |
Ethanone, 2,2-dimethoxy-1,2-diphenyl- | 0.069 | 0.058 | 0.151 |
| ug/l |
Fluoranthene |
| 0.003 |
|
| ug/l |
Formamide, N,N-dibutyl- |
|
|
| 0.034 | ug/l |
Hexadecanoic acid, ethyl ester |
|
|
| 0.334 | ug/l |
Hexadecanoic acid, methyl ester |
| 0.062 | 0.073 |
| ug/l |
Hexadecanoic acid, propyl ester |
|
|
| 0.105 | ug/l |
Hexanoic acid |
|
|
| 0.242 | ug/l |
Hexyl salicyclate |
|
|
| 0.034 | ug/l |
Isomaltol | 0.012 |
|
|
| ug/l |
Linoleic acid ethyl ester |
|
|
| 1.1 | ug/l |
Metacetamol | 0.04 |
|
|
| ug/l |
Methylal |
|
|
| 0.05 | ug/l |
N,N,N',N'-Tetraacetylethylenediamine |
| 0.108 | 0.124 | 0.073 | ug/l |
N,N-Diethyl-m-toluamide |
| 0.018 | 0.027 | 0.022 | ug/l |
N-Cyclohexyl-N'-methylurea, N'-methyl |
| 0.019 |
|
| ug/l |
n-Hexadecanoic acid | 0.108 | 0.188 |
| 17 | ug/l |
Nonanal |
|
|
| 0.083 | ug/l |
n-Propyl 9,12-octadecadienoate |
|
|
| 0.312 | ug/l |
n-Propyl acetate |
|
|
| 0.033 | ug/l |
Octadecanoic acid |
| 0.062 | 0.224 | 3 | ug/l |
Octadecanoic acid, ethyl ester |
|
|
| 0.103 | ug/l |
Octan-2-yl palmitate |
| 0.021 | 0.022 | 0.053 | ug/l |
p-Cresol (4-methylphenol) |
|
|
| 0.225 | ug/l |
Pentanoic acid |
|
|
| 0.441 | ug/l |
Pentanoic acid, 5-hydroxy-, 2,4-di-t-butylphenyl esters | 0.079 | 0.063 | 0.099 |
| ug/l |
Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) |
|
| 0.243 |
| ug/l |
Phenol, 2,4-di-t-butyl-6-nitro- |
| 0.024 | 0.012 |
| ug/l |
Phosphoric acid, 2-chloroethenyl dimethyl ester |
| 0.024 |
| 0.026 | ug/l |
Propyzamide | 0.012 | 0.019 | 0.019 |
| ug/l |
Pyridine, 2,3,6-trimethyl- |
| 0.016 |
|
| ug/l |
Sulfurous acid, 2-ethylhexyl hexyl ester |
|
| 0.022 |
| ug/l |
Tetradecane |
|
|
| 0.023 | ug/l |
Tetradecanoic acid |
|
|
| 0.811 | ug/l |
Tri-(2-chloroethyl) phosphate |
|
| 0.045 |
| ug/l |
Tributyl phosphate |
|
|
| 0.027 | ug/l |
Triethyl Citrate |
| 0.831 | 1.2 | 1 | ug/l |
Use limitation statement
There are no public access constraints to this data. Use of this data is subject to the licence identified.
Licence
Attribution statement
© Environment Agency copyright and/or database right 2025. All rights reserved.
Analytical results from samples taken 16 December 2025
Our analysis has been reviewed by specialists in toxicology. Our latest assessment of samples taken on 16 December 2025 suggests there may be minimal seepage into the River Cherwell, however any impacts on the environment are negligible. The chemicals that we’ve found downstream of the site are similar to those already found in the watercourse.
Water quality samples include an assessment using the gas chromatography-mass spectrometry (GCMS) screening technique: Water quality monitoring data GC-MS and LC-MS semi-quantitative screen(External link).
We will continue to monitor and we will make sample results available as and when the analysis is complete.
Analytical results from samples taken 16 December 2025
Samples were taken from the following locations:
Sample | Location (NGR) |
U/S Tributary 1 (Sample 1) | SP 50747 14126 |
U/S Tributary 2 (Sample 2) | SP 50764 13829 |
Ingress (Sample 3) | SP 50791 13850 |
Waste (Sample 4) | SP 50781 14094 |
D/S River Cherwell 1 (Sample 3) | SP 50916 13798 |
D/S River Cherwell 2 (Sample 4) | SP 50943 13253 |
U/S = Upstream of the waste
D/S = Downstream of the waste
Waste = Sample taken from run-off/standing groundwater that has collated around the waste site boundary
NGR = National Grid Reference
Biological Oxygen Demand (BOD) results are not yet available.
Determinand / Compound Name | U/S 1 (Sample 1) | U/S 2 (Sample 2) | Ingress (Sample 3) | Waste (Sample 4) | D/S 1 (Sample 5) | D/S 2 | Unit |
Temperature of Water | 9.1 | 8.6 | 8.5 | 8.7 | 8.5 | 8.6 | CEL |
Conductivity at 25 C | 697 | 610 | 677 | 1271 | 604 | 604 | uS/cm |
BOD : 5 Day ATU |
|
|
|
|
|
| mg/l |
Chemical Oxygen Demand :- {COD} | 29 | 12 | 24 | 95 | 13 | 13 | mg/l |
Ammoniacal Nitrogen as N | <0.03 | <0.03 | <0.03 | 3.2 | <0.03 | <0.03 | mg/l |
Nitrogen, Total Oxidised as N | 1.9 | 6.8 | 2.2 | <0.2 | 6.8 | 6.7 | mg/l |
Nitrite as N | 0.032 | 0.011 | 0.04 | <0.004 | 0.011 | 0.01 | mg/l |
Ammonia un-ionised as N | <0.00013 | <0.00039 | <0.00015 | 0.00935 | <0.00038 | <0.00038 | mg/l |
Solids, Suspended at 105 C | 9.4 | 10 | 29 | 22 | 12 | 13 | mg/l |
Chloride | 56 | 27 | 44 | 52 | 28 | 27 | mg/l |
Orthophosphate, reactive as P | 0.11 | 0.079 | 0.072 | 0.03 | 0.078 | 0.08 | mg/l |
Visible oil or grease, significant trace: Present/Not found (1/0) | Not found | Not found | Not found | Not found | Not found | Not found | N/A |
Salinity : In Situ | 0.34 | 0.3 | 0.33 | 0.64 | 0.29 | 0.29 | ppt |
Oxygen, Dissolved, % Saturation | 43.8 | 86.1 | 49.4 | 30.7 | 87 | 87.1 | % |
Aluminium | 0.2 | 0.33 | 0.47 | 0.29 | 0.51 | 0.42 | mg/l |
Barium | 0.023 | 0.013 | 0.02 | 0.053 | 0.014 | 0.014 | mg/l |
Calcium | 99 | 96 | 110 | 220 | 97 | 97 | mg/l |
Iron | 0.31 | 0.48 | 0.94 | 0.61 | 0.79 | 0.64 | mg/l |
Magnesium | 5.1 | 5.2 | 5.4 | 9.7 | 5.3 | 5.3 | mg/l |
Manganese | 0.041 | 0.017 | 0.034 | 1.2 | 0.026 | 0.021 | mg/l |
Potassium | 6.2 | 3.8 | 5.2 | 5.6 | 3.8 | 3.8 | mg/l |
Sodium | 31 | 17 | 24 | 36 | 17 | 17 | mg/l |
Strontium | 0.33 | 0.24 | 0.33 | 0.76 | 0.24 | 0.24 | mg/l |
Zinc | 0.0078 |
| 0.0084 | 0.047 | 0.0056 | 0.006 | mg/l |
Nickel |
|
|
| 0.0064 |
|
| mg/l |
Copper |
|
|
| 0.024 |
|
| mg/l |
Lead |
|
|
| 0.0071 |
|
| mg/l |
(-)-Pinane-3-carboxylic acid |
|
|
| 0.329 |
|
| ug/l |
(Propan-2-yloxy)carbohydrazide | 0.035 |
|
|
| 0.012 |
| ug/l |
.alpha.,.alpha.'-Dihydroxy-m-diisopropylbenzene |
|
|
| 0.194 |
|
| ug/l |
1-((1S,3aR,4R,7S,7aS)-4-Hydroxy-7-isopropyl-4-methyloctahydro-1H-inden-1-yl)ethanone |
|
|
| 0.268 |
|
| ug/l |
1-(2-Thienyl)-1-propanone |
|
|
| 0.041 |
|
| ug/l |
1(3H)-Isobenzofuranone |
|
|
| 0.156 |
|
| ug/l |
1-(Ethylsulfonyl)piperazine |
|
|
| 0.013 |
|
| ug/l |
1,3,5,7-Tetroxane |
|
|
| 0.173 |
|
| ug/l |
1,3,5-Trially-1,3,5-triazine-2,4,6-trione |
|
|
| 0.143 |
|
| ug/l |
1,3,5-Triazine-2,4,6(1H,3H,5H)-trione, 1,3,5-trimethyl- |
|
|
| 0.038 |
|
| ug/l |
1,3-Benzenediol, monobenzoate |
| 0.017 |
|
|
|
| ug/l |
1,3-Cyclohexadiene-1-carboxaldehyde, 2,6,6-trimethyl- |
|
|
| 0.13 |
|
| ug/l |
1,3-Cyclohexanedione, 2,2,5,5-tetramethyl- |
|
|
| 0.052 |
|
| ug/l |
1,3-Dimethyl-5-pylazolyl-2,4-dichlorobenzoate |
| 0.034 |
|
|
|
| ug/l |
1,4-Dioxane |
|
|
| 0.269 |
|
| ug/l |
1,8-Diazacyclotetradecane-2,7-dione |
|
|
| 0.133 |
|
| ug/l |
1-Butanol, 2,3-dimethyl- | 0.084 | 0.054 | 0.125 | 0.062 | 0.189 | 0.083 | ug/l |
1-Butanol, 4-(1-methylethoxy)- |
|
|
| 0.089 |
|
| ug/l |
1-Butanone, 1-(2,4,5-trihydroxyphenyl)- |
|
|
| 0.015 |
|
| ug/l |
1-Ethyl-2-pyrrolidone |
|
|
| 0.595 |
|
| ug/l |
1H-Pyrazole, 5-methoxy-1,3-dimethyl- |
| 0.012 | 0.013 |
|
|
| ug/l |
1-Pentanone, 1-(4-methylphenyl)- |
|
|
| 0.023 |
|
| ug/l |
1-Propanol, 2-(2-hydroxypropoxy)- |
|
|
| 0.183 |
|
| ug/l |
2-(2-(2-Butoxyethoxy)ethoxy)acetic acid |
|
|
| 0.277 |
|
| ug/l |
2-(2-Butoxyethoxy)acetic acid |
|
|
| 0.341 |
|
| ug/l |
2-(2-Chloroethoxy)-1,3,2-dioxaphospholan-2-one |
|
|
| 0.014 |
|
| ug/l |
2-(2-Chloroethoxy)ethyl bis(2-chloroethyl) phosphate |
|
|
| 0.221 |
|
| ug/l |
2(3H)-Benzothiazolone |
|
|
| 2 |
|
| ug/l |
2(5H)-Furanone, 5-(acetyloxy)- |
| 0.015 |
|
|
|
| ug/l |
2,2,4,4,5,5,7,7-Octamethyloctane | 0.039 |
|
|
| 0.046 |
| ug/l |
2,2,5,5-Tetramethyl-3-hexanone |
| 0.012 | 0.019 |
|
|
| ug/l |
2,3-Dimethylpentanoic acid |
|
|
| 0.14 |
|
| ug/l |
2,4,7,9-Tetramethyl-5-decyne-4,7-diol |
| 0.131 | 0.12 | 4.6 | 0.157 | 0.164 | ug/l |
2,4-Imidazolidinedione, 5-ethyl-5-methyl- |
|
|
| 0.02 |
|
| ug/l |
2,6-Dimethoxyhydroquinone |
|
|
| 0.018 |
|
| ug/l |
2-Chloroethyl benzoate |
|
| 0.047 | 0.094 |
|
| ug/l |
2H-Pyran-2-one, tetrahydro-4-methyl- |
|
|
| 0.015 |
|
| ug/l |
2-Pentanol, 2-methyl- |
|
|
|
| 0.012 | 0.027 | ug/l |
2-Propanol, 1-(2-butoxy-1-methylethoxy)- |
|
|
| 0.201 |
|
| ug/l |
2-Propanol, 1-(2-methoxy-1-methylethoxy)- |
|
|
| 0.031 |
|
| ug/l |
2-Propanol, 1,3-dichloro- |
|
| 0.013 | 0.226 |
|
| ug/l |
2-Propanol, 1-butoxy- |
|
|
| 0.027 |
|
| ug/l |
2-Propanol, 1-chloro- |
|
|
| 0.569 |
|
| ug/l |
2-Propanol, 1-chloro-, phosphate (3:1) |
|
| 1.9 | 38 |
|
| ug/l |
2-Pyrrolidinone, 1-butyl- |
|
|
| 0.056 |
|
| ug/l |
2-Pyrrolidinone, 1-methyl- |
|
|
| 0.065 |
|
| ug/l |
2-Thio-2,4-oxazolidinedione |
|
|
| 0.017 |
|
| ug/l |
2-Thiopheneacetamide, N,N-dibutyl- |
|
|
| 0.074 |
|
| ug/l |
2-Thiophenecarboxylic acid, 4-nitrophenyl ester |
|
|
| 0.035 |
|
| ug/l |
3,5-di-tert-Butyl-4-hydroxyphenylpropionic acid |
|
|
| 1.5 |
|
| ug/l |
3,5-Heptanedione, 2,2,4,6,6-pentamethyl- |
|
| 0.017 |
|
|
| ug/l |
3-Cyclohexen-1-ol, 4-methyl-1-(1-methylethyl)-, (R)- |
|
|
| 0.079 |
|
| ug/l |
3-Ethyl-4-hydroxy-dihydro-furan-2-one |
|
|
| 0.051 |
|
| ug/l |
3-Ethylheptanoic acid |
|
|
| 0.065 |
|
| ug/l |
3-Heptanone, 2,4-dimethyl- |
|
|
|
| 0.018 |
| ug/l |
3-Heptyne-2,6-dione, 5-methyl-5-(1-methylethyl)- |
|
|
| 0.049 |
|
| ug/l |
3-Hexanol, 4-methyl- |
|
| 0.027 |
|
|
| ug/l |
3-Hexen-1-ol, propanoate, (Z)- |
|
|
| 0.027 |
|
| ug/l |
3-Pentanol, 3-methyl- |
|
|
| 0.071 |
|
| ug/l |
3-Piperidinol, 1-ethyl- |
|
|
| 0.054 |
|
| ug/l |
4,4-Dimethyl-1,2,3,4-tetrahydro-.gamma.-carboline |
|
|
| 0.024 |
|
| ug/l |
4,5-Dimethoxy-2-hydroxyacetophenone |
|
|
| 0.136 |
|
| ug/l |
4,6-Octadiyn-3-one, 2-methyl- |
|
|
|
| 0.01 |
| ug/l |
4-Chlorobutyric acid, 4-isopropylphenyl ester |
|
|
| 0.021 |
|
| ug/l |
4-Ethyl-2,6-dimethoxyphenol |
|
|
| 0.062 |
|
| ug/l |
4-Octene-2,7-diol, 2,7-dimethyl-, Z- |
|
|
| 0.054 |
|
| ug/l |
4-Piperidinone, 2,2,6,6-tetramethyl- |
|
|
| 0.044 |
|
| ug/l |
4'-Propoxy-2-methylpropiophenone |
|
|
| 0.124 |
|
| ug/l |
4-Propoxybenzoic acid trimethylsilyl ester |
|
|
| 0.018 |
|
| ug/l |
5'-Hydroxy-2',3',4'-trimethylacetophenone |
|
|
| 0.19 |
|
| ug/l |
5-Hydroxymethylfurfural |
|
|
| 0.279 |
|
| ug/l |
7-Chloro-1-(4-fluorophenyl)heptan-1-one |
|
|
| 0.035 |
|
| ug/l |
8-Hydroxycarvotanacetone |
|
|
| 0.055 |
|
| ug/l |
Acetic acid ethenyl ester |
|
|
|
| 0.019 |
| ug/l |
Acetic acid, (2,4-xylyl)- |
|
|
| 0.148 |
|
| ug/l |
Acetyl valeryl |
|
|
| 0.021 |
|
| ug/l |
Atrazine |
|
|
| 2.9 |
|
| ug/l |
Atrazine desethyl |
|
|
| 1.4 |
|
| ug/l |
Aziridinone, 1,3-bis(1,1-dimethylethyl)- |
|
|
| 0.026 |
|
| ug/l |
Benzenamine, 4-methyl-N,N-bis(4-methylphenyl)- |
|
|
| 0.022 |
|
| ug/l |
Benzeneacetic acid |
|
|
| 0.529 |
|
| ug/l |
Benzenebutanoic acid, 2,5-dimethyl- |
|
|
| 0.345 |
|
| ug/l |
Benzenemethanol, .alpha.,.alpha.,4-trimethyl- |
|
|
| 0.228 |
|
| ug/l |
Benzenemethanol, .alpha.,.alpha.-dimethyl- |
|
|
| 0.116 |
|
| ug/l |
Benzenemethanol, .alpha.-methyl- |
|
|
| 0.027 |
|
| ug/l |
Benzenesulfonamide, 2-methyl- |
|
|
| 0.256 |
|
| ug/l |
Benzenesulfonamide, 4-methyl- |
|
| 0.251 | 7.2 |
|
| ug/l |
Benzenesulfonamide, N-butyl | 0.222 |
| 0.565 | 3.8 |
|
| ug/l |
Benzenesulfonanilide |
|
|
| 0.059 |
|
| ug/l |
Benzoic acid, 2,4,6-trimethyl- |
|
|
| 0.435 |
|
| ug/l |
Benzoic acid, 2,6-dichloro- |
|
|
| 0.029 |
|
| ug/l |
Benzoic acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy- |
|
|
| 0.077 |
|
| ug/l |
Benzoic acid, 4-(1-methylethyl)- |
|
|
| 0.095 |
|
| ug/l |
Benzoic acid, 4-methyl- |
|
|
| 0.017 |
|
| ug/l |
Bicyclo[2.2.1]heptane-2,5-dione, 1,7,7-trimethyl- |
|
|
| 0.035 |
|
| ug/l |
Bicyclo[3.1.1]heptan-2-one, 3,6,6-trimethyl- |
|
|
| 0.34 |
|
| ug/l |
Bis(1-chloro-2-propyl)(3-chloro-1-propyl)phosphate |
|
| 0.281 | 13 |
|
| ug/l |
Bis(1-chloro-2-propyl)-3-(3-chloropropoxy)propyl phosphate |
|
|
| 0.487 |
|
| ug/l |
Bis(2-methoxyethoxy)methane |
|
|
| 1.6 |
|
| ug/l |
Bis(3-chloro-1-propyl)(1-chloro-2-propyl)phosphate |
|
| 0.018 | 1 |
|
| ug/l |
Bisphenol A |
| 0.015 | 0.102 | 0.576 |
| 0.017 | ug/l |
Bromoform | 0.017 | 0.017 | 0.011 |
| 0.014 | 0.012 | ug/l |
Butane, 2-methoxy-2-methyl- |
|
|
| 0.074 |
|
| ug/l |
Butanoic acid, 2-ethyl-, methyl ester |
|
|
| 0.115 |
|
| ug/l |
Butanoic acid, 2-methyl- |
|
|
| 0.02 |
|
| ug/l |
Butanoic acid, 3-methyl- |
|
|
| 0.142 |
|
| ug/l |
Butanoic acid, methyl ester |
|
| 0.016 |
|
|
| ug/l |
Caffeine | 0.026 | 0.053 | 0.19 |
| 0.065 | 0.063 | ug/l |
Caprolactam |
|
|
| 19 |
|
| ug/l |
Carbamazepine |
| 0.016 |
|
| 0.023 | 0.019 | ug/l |
Carbonic acid, 2-ethoxyethyl 2-methoxyethyl ester |
|
|
| 0.038 |
|
| ug/l |
Coumarin |
|
|
| 0.177 |
|
| ug/l |
Cyclobutanone, 2,3,3-trimethyl- |
|
|
| 0.014 |
|
| ug/l |
Cyclohexanecarboxylic acid, 4-(1,5-dimethyl-3-oxohexyl)-, methyl ester, cis- |
|
|
| 0.454 |
|
| ug/l |
Cyclohexanemethanol, 4-hydroxy-.alpha.,.alpha.,4-trimethyl- |
|
|
| 0.41 |
|
| ug/l |
Cyclohexanol |
|
|
| 0.033 |
|
| ug/l |
Cyclopenta[g]-2-benzopyran, 1,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethyl- |
|
|
|
| 0.009 |
| ug/l |
Decyl acrylate |
| 0.029 | 0.059 |
|
|
| ug/l |
Dehydroabietic acid |
|
|
| 0.291 |
|
| ug/l |
Didesmethyldiphenhydramine |
|
|
| 0.024 |
|
| ug/l |
Diethyl carbitol |
|
|
| 0.055 |
|
| ug/l |
Diethyl ethylphosphonate |
|
|
| 0.049 |
|
| ug/l |
Dimethyl sulfone |
|
|
| 0.061 |
|
| ug/l |
Diphenyl sulfone |
|
| 0.08 | 0.363 |
| 0.005 | ug/l |
Disulfide, diheptyl |
|
|
| 0.095 |
|
| ug/l |
DL-4,5-Octanediol |
|
|
| 0.033 |
|
| ug/l |
Ethanol, 2-butoxy-, phosphate (3:1) |
|
|
| 0.285 |
|
| ug/l |
Ethanol, 2-ethoxy- |
|
|
| 0.046 |
|
| ug/l |
Ethanone, 1-(3-hydroxy-4-methoxyphenyl)- |
|
|
| 0.019 |
|
| ug/l |
Ethiolate |
|
|
| 0.167 |
|
| ug/l |
Ethyl 4-(ethyloxy)-2-oxobut-3-enoate |
|
|
| 0.057 |
|
| ug/l |
Eucalyptol |
|
|
| 0.027 |
|
| ug/l |
Fenchone |
|
|
| 0.028 |
|
| ug/l |
Fluoranthene | 0.007 | 0.004 | 0.005 |
| 0.009 | 0.009 | ug/l |
Formamide, N,N-dimethyl- |
|
|
| 0.025 |
|
| ug/l |
Fumaric acid, 4-cyanophenyl pentyl ester |
|
|
| 0.098 |
|
| ug/l |
Fumaronitrile |
|
|
|
|
| 0.012 | ug/l |
hexadecyl acrylate |
|
|
| 0.418 |
|
| ug/l |
Hexamethoxymethylmelamine |
|
|
|
| 0.388 | 0.265 | ug/l |
Hexane, 3,3-dimethyl- |
|
|
| 0.028 |
|
| ug/l |
Hexanoic acid, 3,5,5-trimethyl- |
|
|
| 0.229 |
|
| ug/l |
Hexathiane |
|
|
| 0.431 |
|
| ug/l |
Ibuprofen |
|
|
| 0.174 |
|
| ug/l |
l-Alanine, N-(2,3,4-trifluorobenzoyl)-, methyl ester |
|
|
| 0.056 |
|
| ug/l |
L-Fenchone |
|
|
| 0.028 |
|
| ug/l |
m-Aminophenylacetylene |
|
|
| 0.523 |
|
| ug/l |
Mecoprop |
|
|
| 5.3 |
|
| ug/l |
N,N,N',N'-Tetraacetylethylenediamine |
|
|
|
| 0.042 | 0.051 | ug/l |
N,N-Diethyl-m-toluamide |
| 0.016 | 0.014 | 0.388 | 0.013 | 0.016 | ug/l |
N-Cyclohexyl-N'-methylurea, N'-methyl |
|
|
| 0.024 |
|
| ug/l |
Neodecanoic acid |
|
|
| 0.612 |
|
| ug/l |
n-Hexadecanoic acid | 0.156 |
|
|
|
|
| ug/l |
Octadecanoic acid |
|
|
| 0.523 |
|
| ug/l |
Pentanoic acid, 5-hydroxy-, p-t-butylphenyl ester |
| 0.011 | 0.014 |
|
|
| ug/l |
Phenylacetamide, 4-fluoro-N-propyl- |
|
|
| 0.014 |
|
| ug/l |
Phosphoramidous difluoride |
|
|
| 0.021 |
|
| ug/l |
Phosphoric acid, 2-chloroethenyl dimethyl ester |
|
| 0.016 |
|
|
| ug/l |
Phthalic anhydride |
|
|
| 0.022 |
|
| ug/l |
Propanoic acid, 2-methyl- |
|
|
| 0.039 |
|
| ug/l |
Propanol, [(butoxymethylethoxy)methylethoxy]- |
|
|
| 0.032 |
|
| ug/l |
Propyzamide |
| 0.018 | 0.016 |
| 0.017 | 0.021 | ug/l |
Pyrazine |
|
|
| 0.08 |
|
| ug/l |
Pyrene |
|
| 0.004 |
| 0.006 | 0.007 | ug/l |
Pyridine, 2,3,6-trimethyl- |
| 0.021 | 0.011 |
|
| 0.011 | ug/l |
Sal Ethyl carbonate |
|
|
| 0.024 |
|
| ug/l |
Sulfone, methyl phenyl |
|
|
| 0.048 |
|
| ug/l |
Sulfur (S8) |
|
|
| 9.5 |
|
| ug/l |
Terpineol |
|
|
| 1.4 |
|
| ug/l |
Tetramethylfuran |
|
|
| 0.04 |
|
| ug/l |
Tri-(2-chloroethyl) phosphate |
|
| 0.095 | 14 | 0.023 |
| ug/l |
Tributyl phosphate |
|
|
| 0.055 |
|
| ug/l |
Tricyclo[2.2.1.0(2,6)]heptane, 1,3,3-trimethyl- | 0.162 |
|
|
|
|
| ug/l |
Triethyl Citrate |
| 0.327 |
|
| 0.422 | 0.358 | ug/l |
Triethyl phosphate |
|
|
| 1.6 |
|
| ug/l |
Triisopropylphosphate |
|
|
| 0.071 |
|
| ug/l |
Tris-(1,3-dichloroisopropyl) phosphate |
|
| 0.42 | 2.9 |
|
| ug/l |
Tris(3-chloropropyl) phosphate |
|
|
| 0.031 |
|
| ug/l |
Valproic Acid |
|
|
| 0.03 |
|
| ug/l |
Analytical results from samples taken 4 December 2025
Samples were taken from the following locations:
Sample | Location (NGR) |
U/S Tributary 1 (Sample 1) | SP 50747 14126 |
U/S Tributary 2 (Sample 2) | SP 50764 13829 |
Ingress (Sample 3) | SP 50791 13850 |
Waste (Sample 4) | SP 50781 14094 |
D/S River Cherwell 1 (Sample 3) | SP 50916 13798 |
D/S River Cherwell 2 (Sample 4) | SP 50943 13253 |
U/S = Upstream of the waste
D/S = Downstream of the waste
Waste = Sample taken from run-off/standing groundwater that has collated around the waste site boundary
NGR = National Grid Reference
Determinand / Compound Name | U/S 1 (Sample 1) | U/S 2 (Sample 2) | Ingress (Sample 3) | Waste (Sample 4) | D/S 1 (Sample 5) | D/S 2 (Sample 6) | Unit |
Ammonia un-ionised as N | <0.00014 | <0.00035 | <0.00035 | 0.00548 | <0.00035 | <0.00037 | mg/l |
Ammoniacal Nitrogen as N | <0.03 | <0.03 | <0.03 | 0.78 | <0.03 | <0.03 | mg/l |
BOD : 5 Day ATU | <3 |
|
|
| <3 |
| mg/l |
Chemical Oxygen Demand :- {COD} | 21 | 17 | 16 | 25 | 18 | 14 | mg/l |
Chloride | 80 | 30 | 30 | 54 | 30 | 30 | mg/l |
Conductivity at 25 C | 806 | 570 | 571 | 870 | 566 | 563 | uS/cm |
Nitrite as N | 0.026 | 0.009 | 0.0083 | 0.29 | 0.0087 | 0.0091 | mg/l |
Nitrogen, Total Oxidised as N | 0.71 | 7.6 | 7.5 | 3.3 | 7.6 | 7.6 | mg/l |
Orthophosphate, reactive as P | 0.094 | 0.11 | 0.11 | <0.01 | 0.11 | 0.11 | mg/l |
Oxygen, Dissolved, % Saturation | 52.5 | 87.6 | 87.6 | 79.1 | 87.4 | 88.3 | % |
pH | 7.48 | 7.88 | 7.88 | 7.71 | 7.89 | 7.91 | PHUNITS |
Salinity : In Situ | 0.4 | 0.28 | 0.28 | 0.43 | 0.28 | 0.27 | ppt |
Solids, Suspended at 105 C | <6 | 30 | 31 | 8.3 | 27 | 28 | mg/l |
Temperature of Water | 7.4 | 7.7 | 7.5 | 6 | 7.4 | 7.4 | CEL |
Visible oil or grease, significant trace: Present/Not found (1/0) | Not found | Not found | Not found | Not found | Not found | Not found | N/A |
Aluminium | 0.091 | 1.3 | 1.4 | 0.081 | 1.1 | 1.1 | mg/l |
Barium | 0.022 | 0.015 | 0.016 | 0.029 | 0.014 | 0.014 | mg/l |
Calcium | 120 | 87 | 87 | 160 | 88 | 85 | mg/l |
Iron | 0.18 | 2.1 | 2.4 | 0.14 | 1.8 | 1.9 | mg/l |
Magnesium | 5.4 | 5.4 | 5.5 | 5.9 | 5.5 | 5.4 | mg/l |
Manganese | 0.11 | 0.043 | 0.038 | 0.1 | 0.032 | 0.035 | mg/l |
Potassium | 3.5 | 4.5 | 4.4 | 1.4 | 4.3 | 4.1 | mg/l |
Sodium | 38 | 19 | 19 | 36 | 19 | 18 | mg/l |
Strontium | 0.42 | 0.2 | 0.23 | 0.51 | 0.23 | 0.23 | mg/l |
Zinc |
| 0.015 | 0.013 | 0.0053 | 0.01 | 0.01 | mg/l |
1,2:5,6-Di-O-isopropylidene-a-d-ribohexafurnos-3-ulose |
|
|
|
| 0.01 |
| ug/l |
1,3-Benzenediol, monobenzoate | 0.01 |
|
|
|
|
| ug/l |
1,3-Dimethyl-5-pylazolyl-2,4-dichlorobenzoate | 0.027 | 0.02 | 0.02 |
| 0.023 |
| ug/l |
1-Butanol, 2,3-dimethyl- | 0.023 |
| 0.12 | 0.032 | 0.087 | 0.142 | ug/l |
1-Dodecanamine, N,N-dimethyl- | 0.024 |
|
|
|
|
| ug/l |
1-Hexene, 4,5-dimethyl- |
| 0.042 |
|
|
|
| ug/l |
1H-Pyrazolo[3,4-d]pyrimidin-4-amine | 0.011 |
|
|
|
|
| ug/l |
1-Pentanone, 1-(4-methylphenyl)- |
|
| 0.012 | 0.022 |
|
| ug/l |
2,4,7,9-Tetramethyl-5-decyne-4,7-diol | 0.011 | 0.065 | 0.099 | 0.097 | 0.082 | 0.081 | ug/l |
2,4-Azetidinedione, 3,3-diethyl-1-methyl- |
|
|
|
| 0.012 |
| ug/l |
2-Butanol, 2,3-dimethyl- |
|
|
| 0.049 |
|
| ug/l |
2-Cyanoethyl acrylate |
|
|
| 0.037 |
|
| ug/l |
2-Ethylhexanoic acid |
|
|
|
| 0.026 |
| ug/l |
2-Propanol, 1-chloro-, phosphate (3:1) | 0.055 |
| 0.067 | 5.6 | 0.084 | 0.055 | ug/l |
2-Propenoic acid, 2-methyl-, (tetrahydro-2-furanyl)methyl ester |
| 0.027 |
|
|
|
| ug/l |
2-Thiobarbituric acid, tris(tert-butyldimethylsilyl) deriv. |
|
| 0.012 |
|
|
| ug/l |
3-Buten-2-one, 3-methyl- |
|
| 0.021 |
|
| 0.081 | ug/l |
3-Hexanol, 5-methyl- | 0.037 |
|
|
| 0.023 |
| ug/l |
3H-pyrazol-3-one, 2,4-dihydro-2-phenyl-5-(phenylamino)- | 0.048 |
|
|
|
|
| ug/l |
3-Penten-2-one |
|
|
|
| 0.017 | 0.049 | ug/l |
acenaphthene |
|
|
|
| 0.002 |
| ug/l |
Anthracene |
|
|
|
| 0.003 |
| ug/l |
Atrazine |
|
|
| 0.138 |
|
| ug/l |
Atrazine desethyl |
|
|
| 0.094 |
|
| ug/l |
Benz[a]anthracene |
|
|
|
| 0.01 |
| ug/l |
Benzaldehyde, 4-benzyloxy-3-methoxy-2-nitro- |
|
|
| 0.02 |
|
| ug/l |
Benzene, 1-ethyl-2,4-dimethyl- | 0.013 |
|
|
|
|
| ug/l |
Benzenesulfonamide, 4-methyl- |
|
|
| 0.372 |
|
| ug/l |
Benzenesulfonamide, N-butyl |
|
|
| 0.612 |
|
| ug/l |
Benzo[a]pyrene |
|
|
|
| 0.006 |
| ug/l |
Bis(1-chloro-2-propyl)(3-chloro-1-propyl)phosphate |
|
|
| 0.978 |
|
| ug/l |
Bis(2-methoxyethoxy)methane |
|
|
| 0.098 |
|
| ug/l |
Bis(3-chloro-1-propyl)(1-chloro-2-propyl)phosphate |
|
|
| 0.064 |
|
| ug/l |
Butane, 2-chloro-2-methyl- |
| 0.097 |
|
|
|
| ug/l |
Butane, 2-methoxy-2-methyl- | 0.014 |
| 0.012 |
| 0.012 |
| ug/l |
Caffeine | 0.006 | 0.048 | 0.065 | 0.614 | 0.051 | 0.041 | ug/l |
Chrysene |
|
| 0.007 |
| 0.011 |
| ug/l |
Coumarin |
|
|
| 0.024 |
|
| ug/l |
Cyclopenta(cd)pyrene, 3,4-dihydro- |
|
|
|
| 0.01 |
| ug/l |
Diphenyl sulfone |
| 0.005 |
| 0.195 | 0.006 |
| ug/l |
Ethanol, 2-(trimethylsilyl)- | 0.011 |
|
|
|
|
| ug/l |
Ethanone, 1-[4-(1-hydroxy-1-methylethyl)phenyl]- |
|
|
| 0.032 |
|
| ug/l |
Ethanone, 2,2-dimethoxy-1,2-diphenyl- |
|
|
| 0.089 |
|
| ug/l |
Flufenacet |
|
| 0.015 |
| 0.014 |
| ug/l |
Fluoranthene | 0.004 | 0.006 | 0.017 | 0.003 | 0.027 | 0.025 | ug/l |
Furan, 2-methoxy- |
|
| 0.012 |
|
|
| ug/l |
Hexadecanoic acid, methyl ester | 0.018 |
|
|
|
|
| ug/l |
Hexane, 3,3-dimethyl- |
| 0.019 |
|
|
|
| ug/l |
Isonicotinic acid, 2-phenylethyl ester |
| 0.028 |
|
|
|
| ug/l |
Methyl Isobutyl Ketone | 0.012 |
|
|
|
|
| ug/l |
Methyl stearate | 0.01 |
|
|
|
|
| ug/l |
N,N,N',N'-Tetraacetylethylenediamine |
|
|
|
| 0.043 |
| ug/l |
N,N-Diethyl-m-toluamide |
|
| 0.012 |
|
|
| ug/l |
n-Decanoic acid |
| 0.017 |
|
|
|
| ug/l |
n-Hexadecanoic acid |
| 0.031 |
|
|
|
| ug/l |
Nitrous acid, cyclohexyl ester |
|
|
|
| 0.01 |
| ug/l |
Nonanal | 0.015 |
| 0.016 |
|
|
| ug/l |
Octadecanoic acid | 0.219 | 0.023 | 0.176 | 0.089 | 0.112 | 0.031 | ug/l |
Pentanal, 2-methyl- | 0.028 |
|
|
|
|
| ug/l |
Pentanoic acid, 5-hydroxy-, 2,4-di-t-butylphenyl esters | 0.024 |
|
|
|
|
| ug/l |
Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) |
| 0.053 |
|
| 0.513 |
| ug/l |
Phthalimide | 0.012 |
|
|
|
|
| ug/l |
Propane, 1,1-dimethoxy- |
|
| 0.012 |
|
|
| ug/l |
Propanoic acid | 0.013 |
|
|
|
|
| ug/l |
Propyzamide |
| 0.026 | 0.042 |
| 0.043 | 0.037 | ug/l |
Pyrene |
| 0.004 | 0.013 |
| 0.017 | 0.017 | ug/l |
Pyridine, 2,3,6-trimethyl- | 0.01 |
|
|
|
|
| ug/l |
Sulfur (S8) |
|
| 0.006 |
| 0.006 |
| ug/l |
trans-3-Penten-2-ol |
|
| 0.11 |
| 0.079 | 0.118 | ug/l |
Tri-(2-chloroethyl) phosphate |
|
|
| 1.1 |
|
| ug/l |
Tri-allate |
| 0.011 | 0.012 |
| 0.014 | 0.014 | ug/l |
Tricyclo[2.2.1.0(2,6)]heptane, 1,3,3-trimethyl |
| 0.101 |
|
|
|
| ug/l |
Triethyl Citrate |
|
| 0.285 |
| 0.241 |
| ug/l |
Triethyl phosphate |
|
|
| 0.041 |
|
| ug/l |
Triphenylphosphine oxide |
|
|
| 0.077 |
|
| ug/l |
Tris-(1,3-dichloroisopropyl) phosphate |
|
|
| 0.149 |
|
| ug/l |
*This data includes that obtained by using the GC-MS analytical technique: further guidance on this is available here: Water quality monitoring data GC-MS and LC-MS semi-quantitative screen
Disclaimer for GCMS Results: All results are an approximate concentration. Where accreditation is claimed this is only for the identification of the substance and not the quantified amount.
The compounds identified in the GCMS results fit into one of four criteria, which can be pulled from the original dataset on MIDAS if required:
Use limitation statement
There are no public access constraints to this data. Use of this data is subject to the licence identified.
Licence
Attribution statement
© Environment Agency copyright and/or database right 2025. All rights reserved.
Analytical results from samples taken 28 November 2025
Samples were taken from the following locations:
Sample | Location (NGR) |
U/S Tributary 1 (Sample 1) | SP 50747 14126 |
U/S Tributary 2 (Sample 2) | SP 50764 13829 |
D/S River Cherwell 1 (Sample 3) | SP 50916 13798 |
D/S River Cherwell 2 (Sample 4) | SP 50943 13253 |
U/S = Upstream of the waste
D/S = Downstream of the waste
NGR = National Grid Reference
Determinand / Compound Name | U/S 1 (Sample 1) | U/S 2 (Sample 2) | D/S 1 (Sample 3) | D/S 2 (Sample 4) | Unit |
Ammonia un-ionised as N | 0.00015 | <0.00038 | <0.0004 | <0.0004 | mg/l |
Ammoniacal Nitrogen as N | 0.032 | <0.03 | <0.03 | <0.03 | mg/l |
BOD : 5 Day ATU | <3 | <3 | <3 | <3 | mg/l |
Chemical Oxygen Demand :- {COD} | 32 | 11 | 10 | 10 | mg/l |
Chloride | 47 | 35 | 35 | 34 | mg/l |
Conductivity at 25 C | 647 | 659 | 654 | 654 | uS/cm |
Nitrite as N | <0.004 | 0.0087 | 0.0079 | 0.0077 | mg/l |
Nitrogen, Total Oxidised as N | 0.22 | 6.9 | 7 | 6.9 | mg/l |
Orthophosphate, reactive as P | 0.081 | 0.11 | 0.1 | 0.1 | mg/l |
Oxygen, Dissolved, % Saturation | 53.1 | 90 | 90.2 | 89.2 | % |
pH | 7.47 | 7.92 | 7.92 | 7.95 | PHUNITS |
Salinity : In Situ | 0.32 | 0.32 | 0.32 | 0.32 | ppt |
Solids, Suspended at 105 C | <6 | 12 | 11 | 12 | mg/l |
Temperature of Water | 8.4 | 7.5 | 8.1 | 7.4 | CEL |
Visible oil or grease, significant trace: Present/Not found (1/0) | Not found | Not found | Not found | Not found | N/A |
Aluminium | 0.031 | 0.22 | 0.31 | 0.27 | mg/l |
Barium | 0.016 | 0.012 | 0.013 | 0.013 | mg/l |
Calcium | 100 | 99 | 100 | 100 | mg/l |
Iron | 0.086 | 0.48 | 0.67 | 0.59 | mg/l |
Magnesium | 4.6 | 5.8 | 5.9 | 5.9 | mg/l |
Manganese | 0.08 | 0.015 | 0.022 | 0.019 | mg/l |
Potassium | 2.8 | 4.3 | 4.4 | 4.4 | mg/l |
Sodium | 22 | 22 | 22 | 22 | mg/l |
Strontium | 0.34 | 0.25 | 0.26 | 0.26 | mg/l |
Zinc |
|
| 0.005 | 0.0051 | mg/l |
1(3H)-Isobenzofuranone, 3,3-dimethyl- | 0.011 | 0.015 |
| 0.011 | ug/l |
1,2-Benzenedicarboxylic acid | 0.014 |
|
|
| ug/l |
1,2-Bis(3,5,5-trimethyl-2-cyclohexenylidene)hydrazine |
| 0.012 |
| 0.011 | ug/l |
1,3-Dimethyl-5-pylazolyl-2,4-dichlorobenzoate | 0.016 | 0.018 | 0.016 | 0.028 | ug/l |
1-Decanamine, N-decyl-N-methyl- | 0.018 |
|
|
| ug/l |
1-Dodecanamine, N,N-dimethyl- | 0.705 | 0.024 |
|
| ug/l |
1-Hexene, 4,5-dimethyl- |
| 0.031 |
|
| ug/l |
1-Pentanol, 4-methyl-2-propyl- |
|
| 0.034 | 0.036 | ug/l |
1-Pentene, 2,4,4-trimethyl- | 0.011 |
|
|
| ug/l |
1-Tetradecanamine, N,N-dimethyl- | 0.142 |
|
|
| ug/l |
2,2,4-Trimethyl-1,3-pentanediol diisobutyrate |
|
|
| 0.013 | ug/l |
2,2-Dimethylpropionic acid, 4-methylpentyl ester |
| 0.016 |
|
| ug/l |
2,3,4,5-Tetrafluorobenzyl alcohol, 2-methylpropyl ether |
|
|
| 0.009 | ug/l |
2,3-Dihydro-2-methyl-5-ethylfuran | 0.02 |
|
|
| ug/l |
2,4,7,9-Tetramethyl-5-decyne-4,7-diol |
| 0.067 | 0.082 | 0.077 | ug/l |
2,4-Dichlorobenzamide |
|
|
| 0.044 | ug/l |
2-Chloroethyl benzoate |
|
|
| 0.021 | ug/l |
2-Ethyl-1-butanol, trifluoroacetate |
|
| 0.012 | 0.013 | ug/l |
2-Fluoro-6-trifluoromethylbenzoic acid, 4-nitrophenyl ester |
|
|
| 0.324 | ug/l |
2-Propanol, 1-chloro-, phosphate (3:1) | 0.043 | 0.06 | 0.083 | 0.087 | ug/l |
3,7-Dimethyl-1-phenylsulfonyl-2,6-octadiene |
|
|
| 0.011 | ug/l |
3-Buten-2-one, 3-methyl- |
|
|
| 0.009 | ug/l |
3-Penten-2-one |
| 0.009 |
|
| ug/l |
4-fluorophenyl 4-(4-pentylcyclohexyl)benzoate |
| 0.009 |
|
| ug/l |
4-Methyl-3-heptanol, trifluoroacetate | 0.03 |
|
|
| ug/l |
5-(4-Hexyloxybenzoyloxy)-2-(4-nitrophenyl)pyrimidine |
| 0.022 |
|
| ug/l |
Benzoic acid, (4-benzoyloxy-2-chlorophenyl) ester |
|
|
| 0.01 | ug/l |
Butane, 2-chloro-2-methyl- |
| 0.12 | 0.109 | 0.095 | ug/l |
Butane, 2-methoxy-2-methyl- | 0.011 | 0.011 | 0.014 | 0.011 | ug/l |
Butanoic acid, 2-pentenyl ester, (Z)- |
|
| 0.009 |
| ug/l |
Caffeine | 0.009 | 0.075 | 0.099 | 0.075 | ug/l |
Carbamazepine |
| 0.022 | 0.029 | 0.028 | ug/l |
Coumarin |
|
|
| 0.003 | ug/l |
Crotamiton |
| 0.023 |
|
| ug/l |
Cyclohexane, (1,1-dimethylethyl)- | 0.012 |
|
|
| ug/l |
Cyclopenta[g]-2-benzopyran, 1,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethyl- |
|
| 0.015 | 0.009 | ug/l |
Diethylcyanamide | 0.011 |
|
|
| ug/l |
Diphenyl sulfone |
| 0.007 | 0.008 | 0.007 | ug/l |
Dodecylmethylbenzylamine | 0.079 |
|
|
| ug/l |
Ethanedioic acid, dibutyl ester |
|
| 0.01 |
| ug/l |
Ethanol, 2-(trimethylsilyl)- |
|
| 0.011 |
| ug/l |
Ethanone, 1,1'-(1,4-phenylene)bis- |
|
| 0.013 |
| ug/l |
Ethanone, 1-[4-(1-hydroxy-1-methylethyl)phenyl]- |
| 0.012 | 0.015 |
| ug/l |
Flufenacet |
| 0.018 | 0.023 |
| ug/l |
Fluoranthene | 0.004 | 0.003 | 0.003 | 0.003 | ug/l |
Furan, 2-methoxy- |
|
|
| 0.008 | ug/l |
Furan, 2-methoxy-ug/l |
| 0.01 |
|
| ug/l |
Isopropyl palmitate |
|
|
| 0.813 | ug/l |
Metacetamol |
| 0.01 | 0.012 | 0.011 | ug/l |
Methyl stearate |
|
| 0.015 | 0.013 | ug/l |
Methyl stearate 0.018 Nonanal | 0.014 |
|
|
| ug/l |
N,N,N',N'-Tetraacetylethylenediamine |
| 0.056 | 0.066 | 0.047 | ug/l |
N,N-Diethyl-m-toluamide |
| 0.015 | 0.017 | 0.016 | ug/l |
Neopentane |
|
|
| 0.009 | ug/l |
n-Hexadecanoic acid | 0.354 |
|
|
| ug/l |
Nonanal |
| 0.014 | 0.018 | 0.015 | ug/l |
Octadecanoic acid | 0.365 | 0.242 | 0.262 | 0.265 | ug/l |
Pentanoic acid, 5-hydroxy-, 2,4-di-t-butylphenyl esters | 0.025 | 0.024 | 0.031 | 0.019 | ug/l |
Pentanoic acid, 5-hydroxy-, p-t-butylphenyl ester |
|
|
| 0.013 | ug/l |
Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) | 0.262 | 0.725 | 1.3 | 0.837 | ug/l |
Propanoic acid | 0.014 |
|
|
| ug/l |
Propyzamide |
| 0.041 | 0.046 | 0.046 | ug/l |
Pyrene |
|
| 0.003 | 0.002 | ug/l |
Pyridine, 2,3,6-trimethyl- |
|
| 0.011 |
| ug/l |
Succinic acid, di(4-trifluoromethoxybenzyl) ester |
|
| 0.48 |
| ug/l |
Sulfurous acid, 2-ethylhexyl hexyl ester |
| 0.046 |
|
| ug/l |
TATP |
|
| 0.012 |
| ug/l |
Tetradecanoic acid, 10,13-dimethyl-, methyl ester | 0.016 |
|
| 0.015 | ug/l |
Thiophene, 2,5-di(benzoylthio)- |
| 0.009 |
|
| ug/l |
Tri-allate |
| 0.008 | 0.006 | 0.012 | ug/l |
Triethyl Citrate |
| 0.208 | 0.325 | 0.366 | ug/l |
Trifluoroacetic acid, 2-tetrahydrofurylmethyl ester | 0.012 | 0.018 |
| 0.008 | ug/l |
*This data includes that obtained by using the GC-MS analytical technique: further guidance on this is available here: Water quality monitoring data GC-MS and LC-MS semi-quantitative screen
Disclaimer for GCMS Results: All results are an approximate concentration. Where accreditation is claimed this is only for the identification of the substance and not the quantified amount.
The compounds identified in the GCMS results fit into one of four criteria, which can be pulled from the original dataset on MIDAS if required:
Use limitation statement
There are no public access constraints to this data. Use of this data is subject to the licence identified.
Licence
Attribution statement
© Environment Agency copyright and/or database right 2025. All rights reserved.
Analytical results from samples taken 17 November 2025
Determinand / Compound Name | Upstream 1 (Sample 1) | Upstream 2 (Sample 2) | Downstream 1 (Sample 3) | Downstream 2 (Sample 4) | Unit |
(Propan-2-yloxy)carbohydrazide |
|
|
| 0.01 | ug/l |
.alpha.-Hydroxyisobutyric acid, acetate |
|
|
| 0.01 | ug/l |
.alpha.-Phellandrene | 0.01 | 0.013 | 0.012 |
| ug/l |
.beta.-Ocimene |
| 0.012 |
|
| ug/l |
1-(2,4-Dihydroxyphenyl)-2-(4-nitrophenyl)ethanone |
|
| 0.006 |
| ug/l |
1,2-Bis(3,5,5-trimethyl-2-cyclohexenylidene)hydrazine | 0.014 |
|
|
| ug/l |
1,3-Benzenedicarboxylic acid, bis(2-ethylhexyl) ester |
| 0.038 |
|
| ug/l |
1,3-Benzenediol, monobenzoate |
|
| 0.009 |
| ug/l |
1,3-Dimethyl-5-pylazolyl-2,4-dichlorobenzoate | 0.029 | 0.022 |
|
| ug/l |
1,3-Dioxolane-2-methanol |
|
| 0.009 |
| ug/l |
1-[(1-Propoxypropan-2-yl)oxy]propan-2-yl acetate |
|
|
| 0.011 | ug/l |
1-Butanol, 2,3-dimethyl- |
| 0.102 | 0.117 | 0.132 | ug/l |
1-Butene, 2,3-dimethyl- | 0.025 | 0.02 |
| 0.019 | ug/l |
1-Hexene, 4,5-dimethyl- | 0.146 |
|
|
| ug/l |
1-Pentene, 2,4,4-trimethyl- |
|
| 0.007 | 0.008 | ug/l |
2(3H)-Benzothiazolone |
| 1.2 | 1 | 0.723 | ug/l |
2(5H)-Furanone, 5-(acetyloxy)- |
| 0.015 |
|
| ug/l |
2,4,6-Tris(1,1-dimethylethyl)-4-methylcyclohexa-2,5-dien-1-one |
| 0.026 |
|
| ug/l |
2,4,7,9-Tetramethyl-5-decyne-4,7-diol |
|
| 0.149 | 0.124 | ug/l |
2,4-Diamino-6-methyl-1,3,5-triazine |
|
| 0.006 |
| ug/l |
2,4-Pentanedione, 1,1,1,5,5,5-hexafluoro- | 0.24 |
|
|
| ug/l |
2,5-Dimethyl-2-(2-tetrahydrofuryl)tetrahydrofuran |
| 0.018 | 0.016 | 0.015 | ug/l |
2-Acetyl-1,4,5,6-tetrahydropyridine |
|
|
| 0.009 | ug/l |
2-Aminothiazole-5-carbonitrile |
|
|
| 0.008 | ug/l |
2-Benzyloxy-4,5-methylenedioxybenzyl alcohol |
| 0.01 |
|
| ug/l |
2-Chloroethyl benzoate |
|
| 0.012 | 0.013 | ug/l |
2-Ethylhexanal ethylene glycol acetal |
|
| 0.009 |
| ug/l |
2-Methoxy-1,3-dioxolane | 0.019 |
|
|
| ug/l |
2-Oxobicyclo(3.2.2)nona-3,6-dien-1-yl benzoate | 0.018 |
|
|
| ug/l |
2-Propanol, 1-(2-methoxy-1-methylethoxy)- |
|
| 0.006 |
| ug/l |
3,4-Dihydroxyphenylglycol, 4TMS derivative |
|
|
| 0.013 | ug/l |
3,4-Dimethyl-2-(3-methyl-butyryl)-benzoic acid, methyl ester |
| 0.347 |
|
| ug/l |
3,5-Diamino-1,2,4-triazole |
| 0.017 |
|
| ug/l |
3-Carene |
|
|
| 0.015 | ug/l |
3-Ethoxy-3-methyl-1-butene |
|
| 0.009 |
| ug/l |
3-Methyl-2-pyrrolidinone |
|
|
| 1 | ug/l |
3-Methylnon-1-yn-3-ol | 0.226 |
|
|
| ug/l |
3-Penten-2-one |
|
| 0.022 |
| ug/l |
4,6-Octadiyn-3-one, 2-methyl- |
| 0.022 |
| 0.023 | ug/l |
4-fluorophenyl 4-(4-pentylcyclohexyl)benzoate | 0.016 |
|
|
| ug/l |
4-Hydroxy-2-methylacetophenone |
| 0.008 | 0.008 |
| ug/l |
4-Methyl-1,6-heptadien-4-ol |
|
|
| 0.016 | ug/l |
4-Methyl-6-hepten-4-olide |
|
| 0.023 |
| ug/l |
5-Methoxy-2,3-dimethylindole | 0.139 |
|
|
| ug/l |
6,6-Dimethylheptane-2,4-dione, enol form |
| 0.007 | 0.008 |
| ug/l |
6-Fluoro-2-trifluoromethylbenzoic acid, 2,3-dichlorophenyl |
|
| 0.245 |
| ug/l |
6-Fluoro-2-trifluoromethylbenzoic acid, 2,3-dichlorophenyl ester (see 6-Fluoro-2-trifluoromethylbenzoic acid, 2,3-dichlorophenyl) |
|
| 0.245 |
| ug/l |
6-Fluoro-2-trifluoromethylbenzoic acid, 2-formyl-4,6-dichlorophenyl ester |
| 0.032 |
|
| ug/l |
7-Oxabicyclo[2.2.1]heptane, 1-methyl-4-(1-methylethyl)-2-[(2-methylphenyl)methoxy]-, (1R,2S,4S)-rel- | 0.086 |
|
|
| ug/l |
Acetic acid, (acetyloxy)- | 0.01 |
| 0.016 |
| ug/l |
Acetone |
|
|
| 0.008 | ug/l |
Acetylacetone |
|
|
| 0.007 | ug/l |
Adipic acid, di(but-2-en-1-yl) |
|
| 0.008 |
| ug/l |
Adipic acid, di(but-2-en-1-yl) ester |
|
|
| 0.008 | ug/l |
Allylhydrazone acetaldehyde |
|
| 0.007 |
| ug/l |
Benzene, 1,3-dimethyl- 0.011ug/l CAS IN TARGET [108-38-3 rt=4.5793] |
|
|
|
| ug/l |
Benzenesulfoilide |
|
|
| 0.011 | ug/l |
Benzenesulfonamide, N-butyl | 0.51 | 0.474 | 0.634 | 0.501 | ug/l |
Bicyclo[3.1.0]hex-2-ene, 2-methyl-5-(1-methylethyl)- | 0.012 |
|
|
| ug/l |
Bicyclo[3.1.0]hex-2-ene, 4-methyl-1-(1-methylethyl)- | 0.011 | 0.012 |
| 0.026 | ug/l |
bis(2-ethylhexyl)phthalate (DEHP) | 10 |
|
|
| ug/l |
Bromoform |
|
| 0.007 |
| ug/l |
Caffeine | 0.295 | 0.019 | 0.271 | 0.263 | ug/l |
Caprolactam |
| 0.301 | 0.343 | 0.336 | ug/l |
Carbamazepine |
|
| 0.041 | 0.032 | ug/l |
Cyclobutanone, 2,3-dimethyl-, cis- |
|
|
| 0.007 | ug/l |
Cyclopenta[g]-2-benzopyran, 1,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethyl- | 0.008 |
| 0.007 | 0.016 | ug/l |
Decane, 3,8-dimethyl- |
| 0.054 | 0.023 |
| ug/l |
Decane, 6-ethyl-2-methyl- |
| 0.017 |
| 0.025 | ug/l |
Diethylpropion | 0.01 |
|
|
| ug/l |
Diphenyl sulfone | 0.013 | 0.02 | 0.017 | 0.013 | ug/l |
Dipropyl isopropylphosphonate |
| 0.012 |
|
| ug/l |
Docosane, 1-iodo- |
|
|
| 0.072 | ug/l |
Dodecane, 1-iodo- | 0.512 | 0.027 |
|
| ug/l |
Eicosane |
|
| 0.127 |
| ug/l |
Ethanone, 1-(3-thienyl)- |
|
|
| 0.017 | ug/l |
Ethanone, 1-(9-anthracenyl)- |
| 0.026 |
|
| ug/l |
Ethanone, 2-(formyloxy)-1-phenyl- |
|
| 0.01 |
| ug/l |
Ethofumesate | 0.028 |
| 0.032 | 0.027 | ug/l |
Flufenacet | 0.078 |
| 0.079 | 0.064 | ug/l |
Fluoranthene | 0.006 |
| 0.004 | 0.004 | ug/l |
Formic acid, 4,4-dimethylpent-2-yl ester |
|
| 0.013 |
| ug/l |
Fumaric acid, hexyl 3-nitrophenyl ester |
| 0.015 |
|
| ug/l |
Furan, 2,2'-[1,2-ethanediylbis(oxy)]bis[tetrahydro-5-(2-methoxy-4-methylphenyl)-5-methyl- |
|
|
| 0.018 | ug/l |
Gabapentin |
|
| 0.004 |
| ug/l |
Geosmin |
| 0.019 | 0.008 |
| ug/l |
Hentriacontane |
| 0.415 | 0.303 |
| ug/l |
Hexacosane |
|
|
| 0.302 | ug/l |
Hexane, 3,3-dimethyl- |
|
| 0.018 |
| ug/l |
Hexanoic acid, anhydride |
|
|
| 0.013 | ug/l |
Metaldehyde | 0.023 | 0.024 | 0.021 | 0.025 | ug/l |
Metribuzin |
|
|
| 0.005 | ug/l |
N,N,N',N'-Tetraacetylethylenediamine | 0.194 |
| 0.223 | 0.206 | ug/l |
N,N-Diethyl-m-toluamidex (DEET) | 0.017 |
| 0.022 | 0.019 | ug/l |
N,N-Diethyl-N'-formyl-N'-methoxyurea | 0.01 |
| 0.016 | 0.022 | ug/l |
Nonane, 5-methyl-5-propyl- | 0.105 |
|
|
| ug/l |
O,N-Dibenzoyl-6-hexenelactim |
|
|
| 0.014 | ug/l |
Octacosane |
| 0.52 | 0.419 | 0.181 | ug/l |
Pentacosane | 0.815 | 1.3 | 1.5 | 0.205 | ug/l |
Pentane, 3-ethyl-3-methyl- |
| 0.011 |
|
| ug/l |
Pentanoic acid, 5-hydroxy-, 2,4-di-t-butylphenyl esters | 0.052 |
| 0.043 |
| ug/l |
Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) |
|
|
| 0.879 | ug/l |
Phenyl 4-pyridyl ketone |
| 0.007 |
| 0.008 | ug/l |
Phosphoric acid, 2-chloroethenyl dimethyl |
|
|
| 0.014 | ug/l |
Phosphoric acid, 2-chloroethenyl dimethyl ester | 0.018 |
|
|
| ug/l |
Phthalic anhydride |
|
| 0.006 |
| ug/l |
Propane, 1,1-dimethoxy-2-methyl- |
|
| 0.006 |
| ug/l |
Propyzamide | 0.02 |
| 0.024 | 0.02 | ug/l |
Prosulfocarb | 0.033 | 0.008 | 0.029 | 0.024 | ug/l |
Pyrene |
|
| 0.003 | 0.004 | ug/l |
Pyridine, 2,3,6-trimethyl- |
|
| 0.044 |
| ug/l |
Squalane |
| 53 | 36 | 19 | ug/l |
Succinic acid, di(4-trifluoromethoxybenzyl) ester |
| 0.402 |
| 0.255 | ug/l |
Sulfone, 2-hydroxybutyl t-butyl |
|
|
| 0.007 | ug/l |
Sulfur (S8) | 0.005 |
|
| 0.004 | ug/l |
Sulfurous acid, 2-ethylhexyl hexyl ester |
| 0.029 |
|
| ug/l |
Sulfurous acid, isobutyl pentyl ester | 0.029 |
|
|
| ug/l |
Terpineol |
| 0.005 |
|
| ug/l |
Tetracosane | 3.3 | 0.209 | 0.155 | 0.457 | ug/l |
Tetradecanoic acid, 10,13-dimethyl-, methyl ester | 0.049 | 0.02 |
|
| ug/l |
threo-2,5-Dimethyl-2-(2-methyl-2-tetrahydrofuryl)tetrahydrofuran |
| 0.031 |
| 0.03 | ug/l |
trans-3-Penten-2-ol | 0.128 | 0.089 | 0.102 | 0.118 | ug/l |
Tri-(2-chloroethyl) phosphate | 0.058 | 0.056 | 0.093 | 0.073 | ug/l |
Triacontane | 2 | 0.173 | 0.113 | 0.053 | ug/l |
Triacontane, 1-iodo- |
|
|
| 0.108 | ug/l |
Tri-allate | 0.021 | 0.003 | 0.019 | 0.019 | ug/l |
Tributyl acetylcitrate | 0.306 | 0.025 | 0.04 | 0.023 | ug/l |
Triethyl Citrate | 1.1 |
| 1.3 | 1.2 | ug/l |
Triphenyl phosphate | 2.7 |
| 2.1 |
| ug/l |
Undecane, 2,4-dimethyl- |
| 0.007 |
|
| ug/l |
Undecane, 2,9-dimethyl- | 0.286 |
|
|
| ug/l |
Undecane, 4,7-dimethyl- |
|
| 0.014 |
| ug/l |
Aluminium |
|
|
| 910 | ug/l |
Ammonia un-ionised as N | 0.0003 | <0.00017 | <0.00027 | <0.00033 | mg/l |
Ammoniacal Nitrogen as N | 0.033 | <0.03 | <0.03 | <0.03 | mg/l |
BOD : 5 Day ATU | <3 | <3 | <3 | <3 | mg/l |
Cadmium | <0.1 | <0.1 | <0.1 | <0.1 | ug/l |
Chemical Oxygen Demand :- {COD} | 25 | 43 | 26 | 24 | mg/l |
Chloride | 29 | 41 | 29 | 28 | mg/l |
Chromium | 3.4 | 0.66 | 2.1 | 2.8 | ug/l |
Conductivity at 25 C | 524 | 599 | 523 | 521 | uS/cm |
Copper | 3.3 | 7.2 | 3.1 | 3 | ug/l |
Lead | 2.3 | <2 | <2 | <2 | ug/l |
Nickel | 3.4 | 2.3 | 2.5 | 2.9 | ug/l |
Nitrite as N | 0.026 | 0.019 | 0.029 | 0.025 | mg/l |
Nitrogen, Total Oxidised as N | 6.4 | 0.6 | 6.3 | 6.3 | mg/l |
Orthophosphate, reactive as P | 0.22 | 0.15 | 0.18 | 0.18 | mg/l |
Oxygen, Dissolved, % Saturation | 85.9 | 47.1 | 79.9 | 86.5 | % |
pH | 7.7 | 7.49 | 7.71 | 7.8 | PHUNITS |
Salinity: In Situ | 0.25 | 0.29 | 0.25 | 0.25 | ppt |
Solids, Suspended at 105 C | 42 | 6 | 32 | 42 | mg/l |
Temperature of Water | 9.9 | 9.5 | 9.4 | 9.5 | CEL |
Visible oil or grease, significant trace: Present/Not found (1/0) | Not found | Not found | Not found | Not found | N/A |
Zinc | 13 | 8.6 | 12 | 11 | ug/l |