PPS 21 Sustainable Development in the Countryside·Page 46·5.88
Cumulative Impact of Non-Mains Sewerage Development
New development relying on non-mains sewerage may increase groundwater pollution risk individually or cumulatively, potentially adversely affecting water ecology and chemical quality.
The Directive consequently has implications for decision-making in the development sector. New development relying on non-mains sewerage may, either individually or cumulatively, increase the risk of groundwater pollution. As such, it has the potential to adversely affect the ecology and chemical quality of the water environment.
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/regional/PPS 21 - Sustainable Development in the Countryside.pdf