It follows incidents in Ballymore Eustace and Gorey last month which saw contaminated water enter public supplies.
Irish Water will warn the current management system operating water treatment plants is no longer fit for purpose, when it goes before TDs and Senators later.
The utility will tell an Oireachtas committee there's an urgent need for change.
The Joint Committee on Housing, Local Government and Heritage, chaired by Deputy @stevensgreen1, will meet tomorrow to discuss Water Quality and Infrastructure, and the Small Town and Villages Growth Programme. #seeforyourself https://t.co/JfOczc5TIX pic.twitter.com/jiGUzJKVcP
— Houses of the Oireachtas - Tithe an Oireachtais (@OireachtasNews) September 22, 2021
It follows two incidents in Ballymore Eustace in Kildare and Gorey in Wexford last month which saw contaminated water enter public supplies.
Chair of the Housing committee, Steven Matthews, says what happened is unacceptable:
Deputy Matthews, says members want to ensure what happened in Kildare and in Wexford doesn't happen again
Managing Director of Irish Water Niall Gleeson says the management of treatment plants needs to change

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