Heavy rainfall in the Slieve Bloom Mountains is the cause.
A boil water notice has been in effect for parts of midlands for two weeks.
The warning was first issued by Uisce Éireann on the 20th of June, with households in Tullamore South and Clonaslee affected.
It's since been lifted in Colliers Brook Estate and Spollanstown Industrial Estate, but remains in place elsewhere.
The issue was caused by heavy rainfall in the Slieve Bloom Mountains.
Customers are being advised to boil and cool their water before use.
Read More: Heavy Rainfall To Blame For Midlands Boil Water Notice
€114m Westmeath Wastewater Upgrade Complete
Mary O’Rourke Praised As “Hard Working” At Bridge Naming Ceremony
No Mini Budget Planned Despite Pressure Over Fuel And Energy Prices
Africa Day Celebrations Kick Off Across The Midlands
Tánaiste Hails ‘Proof’ Of Help to Buy Scheme Success Across The Midlands
Westmeath Woman Recounts Israeli Interception
Man Charged In Connection With Fatal Offaly House Fire
Mercosur Trade Deal Kicks Into Action Ahead Of European Court Ruling
Westmeath Woman "Deeply Ashamed" Of Spitting Incident
Taoiseach Pays Tribute To Mary O'Rourke At Bridge Dedication
Midlands Walking Club Celebrates 30th Anniversary This Weekend
OPW Minister Wants "Grown Ups" To Resolve Children's Science Museum Fallout
Offaly TD Criticises VAT Disparity For Beauty And Nail Salons
Laois Council Launches Clinics For Vacant Home Grants
Former Children's TV Presenter Revisits Midlands Towns On Nostalgic Journey
€7m Shannon Callows Flood Plans Facing Key Hurdles
Appeal Lodged Against New Lidl Development In Laois
Housing Completions Jump Sharply In Laois In Early 2026
Bressie To Perform At Oprah Winfrey Dublin Show
Daniel Kinahan To Be Held In Laois Prison