Southwest Environmental Limited

South West Water Sewage Treatment Works Maps 

This map shows the location of sewage works that are owned and operated by South West 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 - E.g. Population served under 2000
• Full Sized - E.g. 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 

Report a Problem

Living Next to a Sewage Works

Buying a House Near a Sewage Works

Technical Infrastructure Analysis: South West Water Region

South West Water Infrastructure and Regional Development

Navigating the planning landscape within the South West Water service area requires a deep understanding of the unique environmental and geographical constraints of Devon, Cornwall, and Somerset. From the rugged topography of Dartmoor and Exmoor to the high-density coastal tourism hubs, our proprietary mapping of sewage treatment works (STW) provides the "True Data" necessary for site vetting. Identifying the proximity of these wastewater assets is essential for assessing development viability and ensuring that planning applications are robust enough to withstand regulatory scrutiny in this ecologically sensitive region.

Odour Impact Assessment and Seasonal Capacity

In the South West, the significant influx of seasonal visitors can place immense pressure on wastewater infrastructure, often leading to increased odour risks during peak summer months. For new residential or tourism developments proposed near existing facilities, this creates substantial challenges regarding odour amenity. By utilizing our proprietary South West Water STW dataset, we perform precision Odour Impact Assessments. We model facility-specific data against local wind patterns to ensure receptors are positioned outside of high-risk odour plumes, protecting resident amenity and holidaymaker experience alike.

Nutrient Neutrality in Somerset and Devon Catchments

Nutrient Neutrality is a critical hurdle for South West development, particularly in catchments affecting the Somerset Levels and Moors, the River Axe, and the River Camel. Our mapping allows us to pinpoint exactly which South West Water asset serves a site and evaluate its specific phosphate or nitrate stripping capabilities. This localized geospatial intelligence is vital for drafting Nutrient Neutrality Assessment and Mitigation Strategies (NNAMS) that satisfy the stringent requirements of Natural England and regional planning authorities.

Strategic Drainage in Coastal and Moorland Environments

The South West’s diverse landscape—ranging from steep moorland valleys to sensitive coastal plains—makes Foul and Surface Water Drainage Strategies highly complex. Our maps help developers visualize the relationship between their site and the wider South West Water network, facilitating informed decisions regarding mains connections versus sustainable urban drainage (SuDS). By identifying nearby assets and potential capacity issues early, we help avoid "Section 106" infrastructure delays often associated with wastewater discharge in the region.

Technical Evidence for South West Planning Applications

Whether you are delivering a bespoke coastal dwelling in Cornwall or a large-scale residential expansion in Devon, our South West Water dataset provides the scientific foundation for your Planning Statement. This "True Data" approach moves beyond generic desktop surveys, offering site-specific insights that are vital for discharging planning conditions. This technical capability is a key reason why SWEL has successfully delivered over 900 projects across the UK, providing the geospatial detail needed to secure successful planning outcomes in the South West.

Flood Risk Assessment

Lux Contour Plans