Essential reservoir cleaning by Uisce Éireann is continuing this week to protect drinking water supplies in Donegal, with communities in Fanad, Carrigans and Letterkenny set to benefit. The information below remains valid until further updates are issued on the organisation’s Supply and Service Updates page.

Routine cleaning is vital to uphold drinking water standards and keep key infrastructure in good condition, ensuring a reliable service for customers. The programme begins at Croghan Reservoir in Fanad on Tuesday, 10 November, with works scheduled between 8am and 6pm.

On Wednesday, 11 November, crews will move to Dunmore Reservoir in Carrigans from 2pm onwards. The later start is intended to lessen any impact on nearby schools.

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The works will then progress to Carnamuggagh Reservoir in Letterkenny on Thursday, 12 November, running from 8am to 6pm.

While disruption will be kept to a minimum, customers supplied by these reservoirs may experience lower water pressure, temporary discolouration or intermittent supply during the works and shortly afterwards. Normal service is expected to resume once each job is completed.

Damien O’Sullivan, Uisce Éireann Water Network Operations Manager for Donegal, said: “Regular reservoir cleaning plays an important role in protecting drinking water quality and ensuring customers can continue to rely on a safe and dependable water supply. We have carefully planned these works to help minimise disruption, including scheduling the works at Dunmore for later in the day to reduce the impact on local schools. We thank customers for their patience and understanding while these essential works are completed.”

Customers can stay updated by visiting the supply and service section of the Uisce Éireann website, checking live updates on X @IWCare, signing up for real-time text alerts, or contacting the 24/7 customer care team on 1800 278 278.