Irish Water is expected to say that the current management system which operates 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.
It follows two incidents in Dublin and Wexford last month which saw contaminated water enter public supplies.
Chair of the Housing committee, Wicklow T.D. Steven Matthews, says what happened is unacceptable:
Study Reveals Wicklow Is Struggling With EV Charging Infrastructure
Wicklow In Top Five Counties For Hardest Workers In National Index
Status Orange Alert: Wind, Flooding and Hazardous Travelling Conditions Expected in Wicklow
Extra Care Urged as Heavy Rain Brings Flood Risk
Over €1 Million Secured For Outdoor Recreation Projects In Wicklow