Sources & editorial standard
Trust grows when
the workings are visible.
We prioritise primary UK guidance, distinguish trade advice from regulation and make our citations easy to follow.
Core references
discharge to ground
Official England rules for septic tanks and small treatment plants that discharge into the ground.
Open original source Environment Agency / GOV.UKdischarge to surface water
Official England rules for treatment plants that discharge to a river, stream, ditch or other surface water.
Open original source Environment Agency / GOV.UKSeptic tanks and treatment plants: what you need to do
Official decision route for operators, existing and new discharges, cesspools and permits in England.
Open original source Natural Resources WalesRegister a septic tank or small sewage treatment plant
The registration and permit route for private sewage systems in Wales.
Open original source Scottish Environment Protection AgencySeptic tanks and private sewage treatment systems
Registration, permitting and maintenance guidance for private sewage discharges in Scotland.
Open original source DAERA / Northern Ireland Environment AgencyRegulating water discharges
Consent requirements for private sewage treatment systems in Northern Ireland.
Open original source Department for Levelling Up, Housing and CommunitiesApproved Document H: drainage and waste disposal
Building Regulations guidance for foul drainage, wastewater treatment systems and drainage fields in England.
Open original sourceReview discipline
How a guide is maintained
Scope the questionOne guide answers one homeowner intent clearly.
Check current originalsWe prefer the organisation responsible for the rule or process.
Write with limitsWe flag uncertainty and avoid remote diagnosis.
Date the reviewEvery technical article shows when it was checked.