Irish Water has confirmed to its customers that the water is safe to drink in Leixlip, Co Kildare.

The firm has carried out tests on the water following a sudden increase in ammonia levels in the River Liffey.

However, Irish Water is reassuring customers that all tests performed on the treated water fully complied with the drinking water quality standards.

As ammonia interferes with the chlorination process, it was necessary that chlorine levels at the plant were increased to ensure disinfection efficiencies were maintained.

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Water quality monitoring is carried out on a daily basis at Leixlip Water Treatment Plant, this includes testing of the raw water entering the plant, the effectiveness of the various treatments and the treated drinking water from the treatment plant.

The ammonia levels in the raw water supplying the Leixlip Water Treatment Plant have now returned to normal and the chlorine levels have also been reduced.

Investigations are being carried out to established the cause for the sudden and temporary elevation in ammonia levels in the River Liffey which could come from many sources due to the large catchment area.

(CD/MH)