What changed in November 2025
SEPA moved water, waste and industrial regulation onto a single framework, EASR. Existing CAR registrations for private sewage discharges automatically became EASR authorisations on 1 November 2025, and you didn't need to do anything. For existing registrations, SEPA's standard conditions (EASR-SC-039) applied from 1 March 2026. SEPA.
Registration or permit?
You can apply to register a discharge from:
- up to 10 domestic properties, or
- a mix of domestic and non-domestic properties serving a population equivalent of up to 50.
The exception is discharges to a phosphate-sensitive catchment or a freshwater loch, which need a permit. SEPA lists a registration fee of £198.55 for a septic tank serving up to 10 homes, and applications are made online. SEPA.
Standard conditions
Registered discharges must meet SEPA's standard conditions. These include keeping the treatment system and outfall maintained and fully working, not significantly affecting drinking water supplies, and not causing visible pollution such as sheen, discolouration, solids, foam or growths in the water.
Building warrants
A new or replacement private drainage system normally needs a building warrant from your local authority's building standards service, as well as SEPA authorisation. Your installer or designer usually prepares the drawings and percolation results both need.
Buying or selling
Home reports and solicitors increasingly ask for SEPA registration details. If the registered person changes, the authorisation needs to be transferred, so check SEPA's guidance on transfers when you buy.
Frequently asked questions
Is CAR still in force in Scotland?
No. From 1 November 2025 private sewage discharges are regulated under EASR. Existing CAR registrations moved across automatically.
How much does SEPA registration cost?
SEPA lists a fee of £198.55 for registering a septic tank serving up to 10 domestic properties. Check SEPA's website for the current fee.
Can I register a septic tank near a loch?
Discharges to a freshwater loch or a phosphate-sensitive catchment need a permit rather than a simple registration. Speak to SEPA or an experienced installer early.