Southwest Environmental Limited

Severn Trent Water Sewage Treatment Works Maps 

This map shows the location of sewage works that are owned and operated by Severn Trent Water. The data is divided into 2 layers, that can be toggled on and off. Larger Waste Water Treatment Works (WwTW) and Smaller Waste Water Treatment Works (Small WwTW).

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

• Small Size - Population served under 2000
• Full Sized - Population served greater than 2000

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.

Sewage Works & You 

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Living Next to a Sewage Works

Buying a House Near a Sewage Works

Technical Infrastructure Analysis: Severn Trent Water Region

Severn Trent Infrastructure and Midlands Planning Constraints

Developments within the Severn Trent Water service area—stretching from the Bristol Channel to the Humber and across the industrial heartlands of the Midlands—require a deep understanding of localized infrastructure capacity. Our proprietary mapping of Severn Trent sewage treatment works (STW) provides the technical evidence needed to vet sites across a vast geographical range. Identifying the proximity of these assets is a critical first step in managing environmental risk, ensuring that planning applications for both urban and rural projects are technically robust.

Odour Impact Assessment for Urban Expansion

In rapidly expanding urban centers like Birmingham, Leicester, and Nottingham, new residential developments often encroach upon long-standing wastewater infrastructure. This creates a significant risk for developers regarding odour complaints and "amenity loss." Utilizing our proprietary Severn Trent STW dataset, we perform precision Odour Impact Assessments. By modeling facility-specific data with local wind patterns, we help position new receptors outside of high-risk odour plumes, satisfying local planning authorities and protecting future residents.

Nutrient Neutrality and Sensitive Midlands Catchments

Nutrient Neutrality is a major hurdle for developments in specific catchments served by Severn Trent, particularly those affecting the River Mease and parts of the River Wye. Our mapping identifies exactly which STW facility serves a proposed site and allows us to analyze its current phosphate stripping capabilities. This localized geospatial intelligence is vital for drafting Nutrient Neutrality Assessment and Mitigation Strategies (NNAMS) that meet the requirements of Natural England and regional planning officers.

Strategic Drainage and Capacity Management

Severn Trent’s network is one of the largest in the UK, often requiring complex Foul and Surface Water Drainage Strategies for large-scale developments. Our maps help developers visualize connection points and potential capacity bottlenecks early in the design phase. This proactive approach facilitates smoother negotiations for mains sewer connections and helps avoid the costly "Section 106" infrastructure delays that can occur when wastewater impacts are not pre-emptively addressed.

Technical Evidence for Professional Planning Statements

Whether you are delivering a small-scale residential scheme or a major industrial installation, our Severn Trent dataset provides a level of detail that standard desktop surveys cannot match. This "True Data" approach is a key reason why SWEL has successfully delivered over 900 projects across the UK. By providing verifiable mapping of Severn Trent assets, we help discharge planning conditions and ensure your project moves from the drawing board to the construction phase with minimal regulatory friction.

Flood Risk Assessment

Lux Contour Plans