A Boil Water Notice is in place for the approximately 19,000 consumers supplied by Athlone Water Treatment.
The precautionary notice will remain in place until 6pm this evening after which normal use of the water supply can be resumed for drinking, food preparation and brushing teeth.
Areas impacted include Athlone Town, West Side, Baylough, Coosan, Baylin, Creve, Mount Temple, Glasson, Tubberclare, and surrounds in Co. Westmeath.
The notice has been put in place as a precaution to protect public health following an issue with the disinfection process which resulted in small quantities of inadequately disinfected water entering the supply.
The issue is now resolved but the notice is in place until 6'o clock this evening as a precaution.