Registration of Waste Water Treatment Systems

Registration of Domestic Waste Water Treatment Systems (Including Septic Tanks)

How do I register and pay the registration fee?

  • Online - - by credit card or debit card.
  • By Post:  Septic Tank Registration Form (PDF) - 867 kbs and from City and County Councils, Libraries, Citizen Information Centres or by telephoning (Lo Call) 1890 800 800.
    Payment can be made by cheque, postal order or bank draft made payable to “Protect Our Water". Send your form with payment to: Protect Our Water, P.O Box 12204, Dublin 7.
  • Local Authority Offices: Payment  by credit or debit card or by cheque, postal order, bank draft or cash can be made in your City or County Council office (no administration fee will be charged by the Council for this). 


The form for written applications can be downloaded from