Register a septic tank or other private sewage treatment system

Register a septic tank or other private sewage treatment system

If you're not on the mains sewer you probably use a private sewage treatment system, such as a septic tank.

This will discharge to land or water and could cause pollution. By law, it must be registered. 

To register

You must have a sewage treatment system in place, such as a septic tank or package treatment plant.

You should ask us to check if you’re not sure whether your treatment system is already registered. If it is and you register it again, we can’t offer a refund.

You can only use this online service if the treatment system:

  • is more than two years old; and
  • serves between one and nine properties.


To register online, you’ll need to:

  • select the address of all properties that use the treatment system; and
  • provide a one-off payment of £151*.


Please contact us if you do not have a sewage treatment system in place, or if it is:

  • less than two years old;
  • serves more than nine properties;
  • near Loch Leven in Fife;
  • near the Lunan Lochs;
  • near Dhoon Bay;
  • near Ayr (South).

Due to the cyber attack we can only process applications where authorisation is required within three weeks.

What personal information we need

To use this online service you'll need to give us your:

  • name
  • email

We'll use this information to contact you about your registration and carry out our legal duties.

For advice on how we will handle your personal information, see our Privacy Notice 



It’s quicker to register online. If you can’t, or if you need help to do this, contact us:

  • Online through the contact us form
  • By calling the SEPA Contact Centre 0800 80 70 60

The Contact Scotland BSL service will give you access to an online interpreter.

After you register

Your answers and registration will be added to the public register.

The registration will be issued to you by email.

The conditions in it must be met to prevent pollution.

Failing to meet these conditions is against the law.


 *SEPA is required by the Scottish Public Finance Manual (SPFM)to recover our costs for regulating activities, including the development, running and maintanance of services.