Guidance on septic tanks/off-mains sewage systems:
- https://www.gov.uk/guidance/comply-with-septic-tank-and-sewage-treatment-plant-permits
- https://www.lakedistrict.gov.uk/planning/planning-for-nature-recovery/nutrient-neutrality/call-for-sites
- www.gov.uk/small-sewage-rules
- https://consult.defra.gov.uk/water/reform-regulatory-system-small-sewage-discharges/results/your-sewage-your-environment-leaflet-july-2015.pdf
General information leaflets: