Roderic O'Gorman (Dublin West, Green Party)
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385. To ask the Minister for Housing, Planning, and Local Government the reason he is proposing to designate nearly 10% of our waterbodies as ‘heavily modified water bodies’ without providing the supporting evidence or analysis to justify this decision, and without fully exploring less damaging alternatives as part of the Water Action Plan consultation; and if he will make a statement on the matter. [28418/25]

James Browne (Wexford, Fianna Fail)
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The Water Action Plan 2024 published by my Department sets out a roadmap to restore Ireland’s water bodies to ‘good status’ or better and to protect water from any further deterioration.

In some instances, water bodies have been physically modified in the past to serve a beneficial specified use to society such as; a drinking water abstraction, a hydroelectric scheme, a flood protection scheme or a drainage scheme aimed at improving agricultural production. In the process of modifying a water body, the natural flow, form or function (hydromorphology) have been altered to the extent that it has impacted the natural aquatic ecology of the water body. In such cases, the water bodies may be designated as Heavily Modified Water Bodies (HMWBs), as provided for under Article 4(3) of the Water Framework Directive (WFD - 2000/60/EC).

Designation of water bodies as HMWBs provides certainty regarding the environmental objectives to be applied to those water bodies for management and regulatory purposes.

Action 3.10 of the Water Action Plan 2024 explicitly states:

“The Minister for Housing, Local Government and Heritage will undertake a short public consultation before deciding whether to designate or de-designate water bodies as HMWBs. There were 466 water bodies, which the EPA has found to meet the criteria for designation. The Minister will take into account the recommendations of the EPA and the key concerns raised in the submissions to the consultation process.”

During the first cycle of the WFD (2010-2015) a relatively low number (33) of water bodies were designated as HMWBs. The advent of new assessment tools in the intervening period has increased our knowledge of the hydromorphological modifications of Ireland’s water bodies. As a result of this increased knowledge, the technical assessment undertaken in 2022 resulted in the current proposed list of 466 water bodies for designation as HMWBs. My Department has accepted this robust scientific assessment and is proposing that the list of 466 water bodies be designated as HMWBs due to their modifications.

Building on the previous consultation with the specified use owners undertaken in 2022 my Department requested specified use owners to provide further information on the proposed HMWBs that relate to the specified uses within their remit. This additional information was used to inform the designation steps.

The Office of Public Works supplied my Department with detailed individual reports on 34 arterial drainage schemes and 16 flood relief schemes. Uisce Éireann in turn supplied detailed individual reports on 15 relevant drinking water supplies. These reports provided the basis for the decisions made by my Department, the outcomes of which are supplied in the Appendix to the consultation.

It is important to note that this is an iterative process; HMWB designation is revisited in each river basin management planning cycle (every 6 years). HMWBs have the potential to be de-designated in future planning cycles, where additional knowledge may inform possible alternative solutions to providing continued societal benefits.

Furthermore, the designation of Heavily Modified Water Bodies gives certainty to regulators with respect to the environmental objectives for those water bodies, which will be vital, for example, in the future licensing of abstractions for water supplies.