The Minister for the Environment says housing estates being built without connections to sewer networks shouldn't be happening.
Slurry tanks are being used to remove wastewater from a new development in Rathfarnham in south Dublin.
The upgraded infrastructure needed to connect the homes to the network isn't due to be completed until next year.
Green party leader Eamon Ryan says its unsatisfactory.
Memoir Launched in Support of Wicklow County Cancer Groups
No League Hangover For Focused Wicklow Who Set Up Dubs Duel With Cruise Past Carlow
Most Wicklow Residents Unprepared for Retirement, PTSB Research Finds
Wicklow Property Prices Jump €25,000 In A Year As Supply Tightens
West Wicklow To Receive Major Fire Service Investment Under National Capital Programme