Domestic Septic Tanks

Domestic Waste Water Treatment Systems (Septic Tanks) must be registered

Code of practice for waste water treatment and disposal consultation

The EPA are consulting on the Code of Practice for Wastewater Treatment and Disposal Systems Serving Single Houses. The Code covers site assessment, installation, and operation of septic tanks and other domestic waste water treatment systems. The building regulations and planning control system require compliance with it. It is therefore of interest to prospective rural dwellers, consultants/engineers, planners and others involved in the domestic waste water treatment sector. (This public consultation ends 22 March 2019)

Registration of Septic Tanks

By law, all owners of premises connected to a domestic wastewater treatment system must register their systems by 1 February 2013. The registration fee is €50.

Application forms are available online on and in Council offices and libraries and Citizens Information Centres.

Once a system is registered, owners need to renew their registration every five years, at no cost. Registration of domestic water treatment systems and septic tanks will allow inspections to check that systems are working properly so that water supplies above and below ground can be protected from the risks posed by systems that aren’t working properly. It is intended that the revenue raised from registration will be used by the water services authorities to manage the registers and to meet the cost of having inspections carried out. There will be no inspection charges for households.

How to register

Owners of domestic wastewater treatment systems or septic tanks in Fingal can register their system and pay the registration fee in the following ways:

  • Online at
  • By forwarding completed application forms along with cheque or payment details for the registration fee (no cash) to:
    Protect our Water 
    PO Box 12204 
    Dublin 7

Inspection of Septic Tanks

The property owner is responsible for the maintenance and upkeep of the Domestic Waste Water Treatment System serving the property. From 2013, insepctions by Fingal County Council will occur annually based on the EPA's National Inspection Plan. 

When the inspector arrives they will show you their ID card and authorisation, and ask you some basic questions about your system. The inspector may look at your registration certificate and other paperwork. The inspector will check manholes and pipework for leaks and that there isn’t an excess of sludge in the system. The drains will be checked to ensure that wastewater and greywater are entering the system where they can be treated, and that roofwater and surfacewater are not entering the tank as that may cause flooding. The percolation area will be checked for signs of ponding, as well as nearby ditches and drains for discharge pipes and signs of pollution. The system will also be checked for nuisance odours and noise. 

You can download a new series of leaflets below, and further information on the scheme and inspections is available on the EPA website