Environmental guidance for your business in Northern Ireland & Scotland

Register your septic tank

Register your septic tank


Why does it need to be registered?

An individual septic tank serving a household, if it is properly maintained doesn’t pose a great threat to the environment. Where there are a lot of septic tanks, the combined discharges can have an effect on the quality of groundwater and of watercourses that pass through the area.

Your environmental regulator needs to know where they are located and how many there are. This is in order to make decisions about whether allowing other activities, or discharges, will cause pollution problems for groundwater, streams or rivers or lochs/loughs.


Check if your septic tank is already registered

You can check if your tank has already been registered by contacting your environmental regulator. If you are unsure then it is best to check and avoid making an unnecessary payment. The NIEA and SEPA have records of all registered septic tanks.

Contact your environmental regulator


Register your septic tank

If your tank is not registered then you must register it with your environmental regulator.

In Northern Ireland you should visit the Northern Ireland Environment Agency website for an application form and guidance documents.

NIEA: Septic tanks and domestic discharges

In Scotland you should visit the SEPA website. You can register online or by post:

SEPA: Registering your existing septic tank

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NIEA - Apply online

SEPA - Application forms