Overview
CALNE STW serves Studley, Wiltshire, England, treating wastewater for approximately 19,132 people. The plant discharges into local waterways within the Thames River basin.
CALNE STW is a wastewater treatment plant located in Studley, Wiltshire, England, serving a population of around 19,132. The facility is situated near the Calne & Chippenham Railway Path and operates within the regulatory framework of the United Kingdom. As a medium-sized agglomeration, the plant is subject to the Urban Waste Water Treatment (England and Wales) Regulations 1994, which implement the EU Urban Waste Water Treatment Directive. These regulations require secondary treatment for inland discharges from populations over 10,000, with potential for tertiary treatment in sensitive areas. The plant's treated effluent is discharged into local watercourses that ultimately drain into the River Avon (Bristol) and then the Severn Estuary. This contributes to the ecological health of the region, supporting aquatic habitats and water quality in the wider Thames and Severn river basins.
Environmental context
CALNE STW discharges into local streams that feed the River Avon (Bristol), which flows into the Severn Estuary, a major ecological feature supporting diverse bird and fish populations. The surrounding Wiltshire landscape includes chalk streams and agricultural areas, making nutrient management important for preventing eutrophication downstream.
Frequently asked questions
CALNE STW is located near Studley, Wiltshire, England, along the Calne & Chippenham Railway Path, with the postcode SN11 0LT.
CALNE STW serves approximately 19,132 people, classifying it as a medium-sized agglomeration under UK wastewater regulations.
CALNE STW discharges treated effluent into local watercourses that flow into the River Avon (Bristol) and eventually the Severn Estuary.
CALNE STW operates under the Urban Waste Water Treatment (England and Wales) Regulations 1994, which implement the EU Urban Waste Water Treatment Directive, requiring secondary treatment for its population size.
For agglomerations of around 19,000 people, UK regulations typically mandate secondary treatment, with tertiary treatment required if discharging into sensitive areas like designated bathing waters or nitrate-vulnerable zones.
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