The Environmental Protection Agency (EPA) is the environmental regulator of Irish Water. We issue and enforce authorisations for waste water discharges. There are approximately 1,100 authorisations nationally.
Irish Water is responsible for the collection, treatment and discharge of urban waste water in Ireland. If you wish to contact Irish Water with regards to a waste water treatment plant or sewer network, please find their contact details on water.ie
You can find out more information regarding a specific authorisation by going to the waste water licence/permit section.
The Commission for Regulation of Utilities is the economic regulator responsible for ensuring that Irish Water is spending its money properly to improve water services. If you wish to contact CRU with regards to Irish Water please find details on the CRU webpage
Waste water is the polluted form of water generated from rainwater runoff and human activities. Browse through our environment and you section to read more about domestic waste water.
Learn more about waste water and what the EPA does.
Urban waste water treatment in Ireland during 2020
This report provides an overview of urban waste water treatment in Ireland during 2020. It highlights the key issues that Irish Water must address, as a priority, to protect our environment from the harmful effects of waste water discharges.
This publication will assist authorities, developers, system manufacturers, system designers, installers, and operators to deal with various systems.
Domestic waste water treatment systems (DWWTS) are used by householders to treat sewage.
Read the key findings on the inspections carried out in 2020 and useful hints on looking after your septic tank.
Date released: June 29, 2022
The Environmental Protection Agency (EPA) today released the report on Domestic Waste Water Treatment Systems Inspections in 2021. This is a report of the 1,147 inspections of septic tanks and other domestic waste water treatment systems completed by local authorities in 2021.
Date released: November 02, 2021
The EPA report on Urban Waste Water Treatment in 2020, released today, shows that the pace at which essential improvements in waste water treatment are being delivered is too slow. Irish Water is making progress in resolving environmental issues and the number of priority areas has reduced from 148 to 97 over the past four years. However, there is still a long way to go to bring all deficient treatment systems up to standard.
Date released: June 29, 2021
The EPA today released the report Domestic Waste Water Treatment System Inspections 2020. This is a review of 809 inspections of septic tanks and other domestic waste water treatment systems in 2020.