There were more than 20 positive tests across the country, according to Irish Water's most recent inspections.
Unsafe levels have been found in drinking water samples in more than 30 areas since 2017.
Flint's water system no longer has levels of lead exceeding the federal limit, Michigan state environmental officials said.
Two state employees facing charges related to the Flint water crisis in Michigan are accused of refusing to order chemical treatment that could have prevented the release of lead in old plumbing.
Townspeople watching millions of gallons of orange-coloured mine waste flow through their communities have demanded clarity about possible long-term threats to their water supply.
A batch of instant noodles worth over €44m is being destroyed by Nestle due to high levels of lead.
Thousands of homeowners are facing bills of around €5,000 to replace lead pipes in their home.
Fears over lead contamination in the public water supply will be discussed by government ministers this morning.
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