Southwest Environmental Limited

Wessex Water Sewage Treatment Works Maps 

Below are a selection of maps showing the location of Sewage Treatment Works in the Wessex Water Area. This cover, Somerset, Wiltshire, Bristol and Parts of Gloucestershire.

You can select the check boxes to choose between layers showing Small, Medium and Large Sewage Treatment Works:

• Small Size - Population served under 2000
• Medium Sized - Population served greater than 2000
• Large Size - Big Works Near Major Cities such as Avonmouth Works, serving Bristol

Note: If you click on each marker, you will be able to view asset ID, which is handy for looking things up. Like CSO performance. Wessex Water's CSO (Combined Sewer Overflow) performance has seen a significant decline, with a notable increase in storm overflow discharges despite all overflows being monitored, with bills increasing! You couldn't make it up. Write to your MP about it. 

Sewage Works & You 

Report a Problem

Living Next to a Sewage Works

Buying a House Near a Sewage Works

The below section was written by a machine.

Technical Dataset: Wessex Water Sewage Treatment Works (STW) Mapping

This technical mapping resource provides the locations of Sewage Treatment Works (STW) managed by Wessex Water across the South West of England. Access to accurate infrastructure data is vital for developers, planners, and environmental consultants when evaluating site suitability and potential constraints related to water utility assets.

Utility Infrastructure Hub

This dataset is part of our wider Sewage Treatment Works Location Maps hub, which provides national coverage of water utility infrastructure. Understanding the proximity of a development site to these facilities is a critical component of professional due diligence.

• Odour Impact Assessment: Proximity to an STW often necessitates a professional Odour Impact Assessment to ensure future residents' amenity is protected.
• Planning Due Diligence: Identifying assets early helps in navigating planning statement requirements regarding infrastructure capacity and buffer zones.
• Drainage Strategy: Data regarding local sewage works can inform the feasibility of a drainage strategy, particularly for foul water connections.

Applications in Environmental Consultancy

For projects requiring an Environmental Impact Assessment (EIA), the location of sewage infrastructure provides essential baseline data. This spatial intelligence is also used during Phase 1 Desktop Studies to identify potential sources of ground or water contamination. By utilizing these datasets, our team can provide highly accurate advice on the risks and opportunities associated with your site's location.

Technical Authority and Reliability

At SWEL, we integrate technical infrastructure data with our professional consultancy services to provide a comprehensive route to planning consent. Whether you are conducting a surface water management plan or assessing nutrient neutrality, our datasets offer the precision required for modern development. With over 900 projects delivered across the UK, we offer the accredited expertise (IES/FGS) needed to support your project’s success.

Our mapping resources are designed to help you understand the complex interaction between development and existing utility networks, ensuring your project remains compliant with local and national regulations.

Flood Risk Assessment

Lux Contour Plans