Half of Co Mayo water supply tainted by parasite

The Environmental Protection Agency (EPA) was due to begin an audit of the Lough Mask water treatment plant today, but agencies said they still did not know how the contamination affecting half of Mayo’s water supply occurred.

Irish Water said the cryptosporidium was detected in one sample of water only, and that the results came back from the laboratory on Friday evening and were acted upon straight away.

However, the incubation period for cryptosporidium – which became a household word after the Galway alert in 2007 – is 14 days. So general practitioners serving the south Co Mayo towns of Castlebar, Westport, Claremorris, Ballinrobe, Ballyhaunis and Knock have been asked to be vigilant.