Sewerage Plants - General Binding Rules - England

If you live in the countryside you may have a sewerage treatment plant.

See below the Government's Environment Agency weblinks setting out the rules regarding installation and sewerage discharge to ground and surface water.

If you don't comply you will have issues on re-sale.

Discharge to Ground

https://www.gov.uk/guidance/general-binding-rules-small-sewage-discharge-to-the-ground

Discharge to Surface Water

https://www.gov.uk/guidance/general-binding-rules-small-sewage-discharge-to-a-surface-water