Septic tank rules in England

A permit depends on meeting the rules

If a domestic sewage discharge meets all applicable General Binding Rules, a permit is not needed. If it does not, use the EA guidance to establish changes or a permit route; do not treat a small tank as automatic exemption.

Ground and surface water are different routes

Check whether sewage goes to the ground or surface water. The rules depend on the route and the discharge’s history. Additional surface-water rules apply to new discharges starting on or after 2 October 2023.

• Ask for the discharge location, date and any changes before using the official guidance.

What people mean by the 2020 rules

Current guidance says a septic tank discharging directly to a watercourse needs action as soon as possible, with plans within a reasonable timescale, usually 12 months. The historic 2020 wording must not be presented as a universal present-day replacement rule. Read the current EA options and update history.

The EA update history preserves the former wording about properties sold before 1 January 2020: buyer and seller were to address replacement or upgrade responsibilities as a condition of sale. This historical note does not replace the current requirements above.

Operation and next checks

England’s ground-discharge guidance addresses sludge capacity, a suggested annual or manufacturer-led desludging interval, and a registered carrier for disposal. Use the complete source, not this page alone, to check every condition for your site.

• Check building/planning requirements with the appropriate authority for the proposed work.
• For a cesspool, use the separate GOV.UK cesspool route.
• If unsure about the system or applicable rule, check with the EA or a competent firm.