Almost 6,000 customers are affected.
A boil water notice has been issued for an area in Offaly.
Issues with the Roscrea Regional Public Water Supply and parts of the Shinrone/Brosna Public Water Supply are impacting customers in Cooleeshill, Killavilla, Whitepark, Sheehane, Cloonagh, Shinrone Village, Brosna, Dungar and surrounding areas.
In Tipperary, Roscrea town and surrounds: Glenbeha, Camlin, Scart, Gortmulin, Thesheehys, Derrymore, Racket Hall, Monaincha, Pintown, Irby, Borris and surrounding areas are affected.
The treatment process at the plant has been impacted by poor water quality in the Little Brosna River, with higher levels of ammonia.
Uisce Eireann have warned that all customers affected must boil water before use until further notice.
Almost €446,000 Allocated To Midlands Community Centres And Clubhouses
Two People Killed In Offaly Following Fatal Crash
Midlands Family Takes On Ireland’s Fittest Family Challenge
5K Fundraiser To Support Motor Neurone Disease Association Takes Place In Westmeath
No Slowing Down With Age As Westmeath Bowlers Shine At 14th Annual National Bowls Competition
Woman Appears In Court Over €280k Cannabis Seizure In Midlands
Status Yellow Fog Warning Issued For Leinster, Munster And Galway
Call For More Public Toilets Across The Midlands And Beyond