Irish Water says it is continuing to work on two schemes in County Sligo which contain high levels of a chemical thought to cause cancer.
The two schemes are on the Environmental Protection Agency’s list for remedial action.
One is the Lough Gill Regional Water Supply Scheme, where Irish Water is progressing with construction on a new water treatment plan at Foxes Den, outside Sligo town.
There are more than 13,000 people on that scheme.
An upgrade to the Lough Talt treatment plant is delayed until the outcome of an appeal to An Bord Pleanala by Sligo County Council.
Meanwhile, the South Sligo Water Supply Scheme is being decommissioned and will now come under the North Roscommon Regional Water Supply Scheme, which is on the remedial list for THMs.
For people in both areas with health concerns, Irish Water spokesman Sean Corrigan is reassuring people the water is safe to drink: