How to register your septic tank in 2025
If you’ve recently had a septic tank or wastewater treatment system installed — or are thinking about it — it’s important to know that registration is a legal requirement in Ireland. At Graf Ireland, we aim to support you every step of the way, including helping you stay compliant.
Why register your septic tank?
Under the Water Services (Amendment) Act 2012, all domestic wastewater treatment systems (including septic tanks) must be registered. This applies to homeowners across Ireland and is a key part of protecting our groundwater and surface water quality. Failure to register may result in fines, and your local authority may carry out inspections — so it’s in your best interest to register as soon as possible after installation.
How to register your septic tank
Registering your system is quick and easy. Here is what you need to do:
1. Visit the official website
You can find the Protect Our Water website by clicking here.
2. Create an account
First-time registrants can click “Create account” and follow the prompts.
3. Enter your details
- Property address and Eircode
- Contact details
- Credit/debit card for the €50 registration fee
4. Complete the registration and get your certificate
Once you've completed the registration you will be on the national register.
What if the system is already registered?
If your property’s system has been registered before, you don’t need to re-register. The original requirement to re-register every five years has been removed. However, if ownership has changed (e.g., you’ve bought a new home), the new owner must update the details with Protect Our Water. You can do this by contacting their support team by email or phone.
Proof of registration for peace of mind
If you’ve purchased your treatment system from us, rest assured it meets the relevant standards — but the final step is ensuring it’s correctly registered with the authorities. Need help to locate your Eircode or to understand what system details to enter? Our team is happy to guide you through the process.
By taking a few minutes to register your septic tank, you’re not only meeting your legal obligations — you’re also doing your part to help protect Ireland’s environment for generations to come.
