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Reducing storm overflow discharges through enhanced storm storage at Holdenhurst WRC
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.
New enhanced storm storage at Holdenhurst Water Recycling Centre (WRC) in Bournemouth has been constructed to reduce storm overflow discharges to the environment and improve bathing water quality.
The high quality of the bathing water in the Bournemouth and Christchurch area is one of the main factors attracting millions of visitors to the region each year. Water quality at the local beaches is assessed by the Environment Agency and most are rated ‘Excellent’.
In addition to the 14 storm tanks already present at Holdenhurst WRC, the new below ground storm storage provides almost 50% more storage, increasing capacity from 19,000m3 to 28,000m3. Modelling has shown that the provision of additional storage at Holdenhurst WRC should reduce the frequency of storm overflow discharges to an average of one per bathing season.
The existing storm storage was built to accommodate future expansions on spare land at the site. Since 2017, the Environment Agency (EA) has been working with local authorities in Dorset regarding the use of the spare land. The final arrangement both met the requirements for the new road junction on the A338 alongside the site and optimised the use of the remaining available land for the new storm storage.
Photograph of the foundations of the Holdenhurst water treatment works upgrade
Reducing storm overflow discharges through enhanced storm storage at Holdenhurst WRC
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.
New enhanced storm storage at Holdenhurst Water Recycling Centre (WRC) in Bournemouth has been constructed to reduce storm overflow discharges to the environment and improve bathing water quality.
The high quality of the bathing water in the Bournemouth and Christchurch area is one of the main factors attracting millions of visitors to the region each year. Water quality at the local beaches is assessed by the Environment Agency and most are rated ‘Excellent’.
In addition to the 14 storm tanks already present at Holdenhurst WRC, the new below ground storm storage provides almost 50% more storage, increasing capacity from 19,000m3 to 28,000m3. Modelling has shown that the provision of additional storage at Holdenhurst WRC should reduce the frequency of storm overflow discharges to an average of one per bathing season.
The existing storm storage was built to accommodate future expansions on spare land at the site. Since 2017, the Environment Agency (EA) has been working with local authorities in Dorset regarding the use of the spare land. The final arrangement both met the requirements for the new road junction on the A338 alongside the site and optimised the use of the remaining available land for the new storm storage.
Photograph of the foundations of the Holdenhurst water treatment works upgrade
Photograph of the foundations of the Holdenhurst water treatment works upgrade