WINEP case study: Affinity Water (AMP7) Ex.2

Reducing nitrate losses to groundwater through a catchment management scheme

The Water Industry National Environment Programme (WINEP) is a cornerstone of environmental regulation in England, setting out the actions water companies must deliver to meet statutory obligations and contribute to wider environmental goals. AMP7, which covered 1 April 2020 to 31 March 2025, represented one of the most ambitious WINEP cycles to date, with over 11,900 actions aimed at improving water quality, protecting biodiversity, and supporting sustainable water resources. The case study below provides an example of one of the completed AMP7 projects.

Through the Environment Agency’s (EA) Nitrogen Efficiency scheme, work has been carried out with farmers in North Hertfordshire to trial measures to reduce nitrate losses to groundwater.

A group of farmers within the Source Protection Zone 2, an area where groundwater is at risk from nitrate contamination were formed into group called 'N Focus Famers Group'. The group is supported by local farmers, Oakbank Game & Conservation and FWAG East (Farming & Wildlife Advisory Group). The group has been championing knowledge exchange on soil health to ensure nitrogen fertiliser is utilised by crops as effectively as possible reducing leaching to groundwater and boosting crop production.

The catchment scheme aims to meet the Water Framework Directives (WFD) 'no deterioration' objective for groundwater from nitrate pollution in the North Hertfordshire area. As well as mitigate the impacts of seasonal changes on the amounts of nitrate on groundwater sources. The approach was developed into the Nitrogen Efficiency scheme in 2023. Defra’s Sustainable Farming Incentive (SFI) scheme provided top-up funding for farmers. This funded measures such as overwinter cover crops and companion cropping.

Funding was combined with SFI for additional benefits and to promote the uptake of SFI. The farmers group have trialled new approaches such as drilling beans and oats crops together to fix more nitrogen from the atmosphere.

N Focus farmers group meeting on agricultural land N Focus farmers group meeting on agricultural land

A field of cover crops funded by the schemeA field of cover crops funded by the scheme

Reducing nitrate losses to groundwater through a catchment management scheme

The Water Industry National Environment Programme (WINEP) is a cornerstone of environmental regulation in England, setting out the actions water companies must deliver to meet statutory obligations and contribute to wider environmental goals. AMP7, which covered 1 April 2020 to 31 March 2025, represented one of the most ambitious WINEP cycles to date, with over 11,900 actions aimed at improving water quality, protecting biodiversity, and supporting sustainable water resources. The case study below provides an example of one of the completed AMP7 projects.

Through the Environment Agency’s (EA) Nitrogen Efficiency scheme, work has been carried out with farmers in North Hertfordshire to trial measures to reduce nitrate losses to groundwater.

A group of farmers within the Source Protection Zone 2, an area where groundwater is at risk from nitrate contamination were formed into group called 'N Focus Famers Group'. The group is supported by local farmers, Oakbank Game & Conservation and FWAG East (Farming & Wildlife Advisory Group). The group has been championing knowledge exchange on soil health to ensure nitrogen fertiliser is utilised by crops as effectively as possible reducing leaching to groundwater and boosting crop production.

The catchment scheme aims to meet the Water Framework Directives (WFD) 'no deterioration' objective for groundwater from nitrate pollution in the North Hertfordshire area. As well as mitigate the impacts of seasonal changes on the amounts of nitrate on groundwater sources. The approach was developed into the Nitrogen Efficiency scheme in 2023. Defra’s Sustainable Farming Incentive (SFI) scheme provided top-up funding for farmers. This funded measures such as overwinter cover crops and companion cropping.

Funding was combined with SFI for additional benefits and to promote the uptake of SFI. The farmers group have trialled new approaches such as drilling beans and oats crops together to fix more nitrogen from the atmosphere.

N Focus farmers group meeting on agricultural land N Focus farmers group meeting on agricultural land

A field of cover crops funded by the schemeA field of cover crops funded by the scheme

Page published: 12 Jan 2026, 11:44 AM