Overview
DORCHESTER STW serves approximately 33,000 people in Dorchester, England. The plant discharges treated wastewater into the local water environment, supporting the River Frome catchment.
DORCHESTER STW is a wastewater treatment plant located in Dorchester, Dorset, England. It serves a population of around 33,000, classifying it as a medium agglomeration under UK regulations. The plant is situated inland, approximately 50 km from the coast, and its treated effluent contributes to the local water cycle. As a UK wastewater facility, DORCHESTER STW operates under the Water Industry Act 1991 and is regulated by the Environment Agency. Plants of this scale typically provide secondary treatment as a minimum, with potential for tertiary treatment depending on local environmental sensitivity. The designed capacity is 1.00 (likely in megalitres per day or similar), indicating the plant's infrastructure is sized for the served population. The treated wastewater from DORCHESTER STW discharges into the River Frome, which flows through the Dorset countryside and eventually reaches Poole Harbour, a large natural harbour of ecological importance. The River Frome supports diverse aquatic life, including salmon and trout, and the harbour is a key site for migratory birds. The plant's operations help protect these downstream ecosystems from nutrient pollution.
Environmental context
DORCHESTER STW discharges into the River Frome, which flows southeast through Dorset to Poole Harbour, a large estuary on the English Channel. The River Frome is a chalk stream known for its clear waters and supports a rich diversity of aquatic plants and invertebrates. Poole Harbour is a designated site of international importance for overwintering waterbirds and supports extensive saltmarsh and mudflat habitats. The plant's nutrient removal performance is critical to preventing eutrophication in this sensitive coastal environment.
Frequently asked questions
DORCHESTER STW is located on St Georges Road in Dorchester, Dorset, England, in the United Kingdom.
DORCHESTER STW serves approximately 33,022 people, classifying it as a medium-sized agglomeration under UK wastewater regulations.
The plant discharges treated effluent into the River Frome, which flows to Poole Harbour and the English Channel.
DORCHESTER STW operates under the UK Water Industry Act 1991 and is regulated by the Environment Agency. It must comply with discharge permits that set limits on pollutants to protect the River Frome and Poole Harbour.
Plants of this scale in England typically provide secondary treatment as a minimum, with tertiary treatment (e.g., nutrient removal) required in sensitive catchments like the River Frome to protect downstream ecosystems.
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