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.
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.
This publication will assist authorities, developers, system manufacturers, system designers, installers, and operators to deal with various systems.
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.
Date released: November 11, 2020
The EPA report on Urban Waste Water Treatment in 2019, released today, highlights that delays in upgrading treatment systems around the country are prolonging risks to the environment and public health.
Date released: November 13, 2019
The EPA report on Urban Waste Water Treatment in 2018, released today, shows there have been some improvements in waste water treatment in the past year, including the elimination of discharges of raw sewage from two areas.