Southwest
Environmental LimitedSouthwest
Environmental Limited| London |
| 02076 920 670 |
| Exeter |
| 01392 927 961 |
| Manchester |
| 01612 970 026 |
| Bristol |
| 01173 270 092 |
This map shows the location of sewage works that are owned and operated by Southern Water. The data is divided into 2 layers, that can be toggled on and off. Larger Waste Water Treatment Works (WwTW) and Sludge Treatment Centres (STCs).
We could not find any data for the smaller sewage works, but there are likely 100's of them dotted around Southern Water's administrative area.
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.
Buying a House Near a Sewage Works
Navigating the planning landscape within the Southern Water service area requires a sophisticated understanding of the South Coast’s unique environmental constraints and high-density infrastructure. From the sensitive chalk streams of Hampshire to the coastal regeneration projects in Kent and Sussex, our proprietary mapping of sewage treatment works (STW) provides the "True Data" necessary for site vetting. Identifying the proximity of these wastewater assets is critical for assessing development viability and ensuring that planning applications are robust enough to withstand the scrutiny of Southern planning authorities.
In the Southern Water region, particularly in cities like Southampton, Portsmouth, and Brighton, new residential developments often occur in close proximity to major wastewater treatment facilities. This creates significant risks regarding odour amenity and potential "encroachment" challenges. By utilizing our proprietary Southern Water STW dataset, we perform precision Odour Impact Assessments. We integrate facility-specific source data with local meteorological patterns to ensure that new receptors are positioned outside of high-risk odour contours, protecting long-term resident amenity.
Nitrate Neutrality has become a pivotal planning hurdle for developments within the Southern Water region, particularly those affecting the Solent and various Special Areas of Conservation (SAC). Our mapping allows us to identify exactly which Southern Water asset serves a proposed site and determine its specific capability for nutrient stripping. This localized geospatial intelligence is essential for drafting Nutrient Neutrality Assessment and Mitigation Strategies (NNAMS) that meet the stringent requirements of Natural England and regional councils.
The Southern region contains globally significant chalk stream environments, making Foul and Surface Water Drainage Strategies particularly complex. Our maps help developers visualize the relationship between their site and the wider Southern Water network, facilitating better-informed decisions regarding mains connections versus sustainable urban drainage (SuDS) requirements. By identifying nearby assets and potential capacity issues early, we help our clients avoid the "Section 106" delays often associated with wastewater discharge in sensitive coastal and river catchments.
Whether you are dealing with a complex urban redevelopment on the South Coast or a rural expansion in the South Downs, our Southern 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 a level of geospatial detail that generic reports cannot match.