Registration of small wastewater discharges

Domestic wastewater generated in our homes and communities must be treated before it is discharged into the environment to protect the quality of both groundwater and surface water. Without adequate treatment, domestic wastewater causes pollution and poses a health risk. In November 2025, the Irish Government approved the introduction of a new regulatory approach for wastewater discharges from small-scale housing developments. Wastewater discharges from developments of up to 40 homes are regulated through registration with the EPA and compliance with General Binding Rules (GBRs).

The European Union (Water Policy) (Small Wastewater Discharge Register) Regulations 2026 (S.I. 65 of 2026) give effect to the Water Framework Directive (2000/60/EC) by introducing a registration regime for certain wastewater discharges to surface water and specifying GBRs to be complied with.

Uisce Éireann will apply to register the discharges with the EPA and assume responsibility for operation and maintenance of the infrastructure and compliance with regulatory standards after completion of process proving and takeover.

The registration system obviates the requirement for an EPA authorisation for these smaller wastewater discharges, instead basing the risk controls on registration criteria published by the EPA and a set of GBRs contained in the regulations. The Small Wastewater Discharges Registration Criteria sets out the criteria that will need to be satisfied when registering a discharge under the regulations.