EPA say no cause for alarm due to presence of THMs in local water supplies

Communities in Roscommon and Longford have been assured there is no threat to their health from a report which suggests a cancer-causing chemical in some drinking water supplies.

52 supplies across the country have elevated levels of trihalomethanes in the latest EPA report – with 17 also recorded as having high levels of Cryptosporidium.

A supply serving nearly 7,500 people in Ballymahon was found to have elevated levels of THMs, along with a source for 4,100 people in Gowna.


There were similar findings from the EPA in the Granard and Longford Central supplies, which serve a total of nearly 18,000.

Two water supplies in Roscommon feature on the list, with the Grangemore, near Boyle, and North Roscommon Regional sources having elevated THMs.

Ruth Barrington, EPA spokesperson, told the Joe Finnegan show that while it’s not ideal to have THM’s in water supplies, people should not be alarmed: