He says Irish Water needs to do something about it.
Drinking water at 12 properties had above the legal limit of lead this year.
A property in Co Roscommon had 15 times the limit, and other failures were in Limerick, Tipperary, Kildare and Dublin.
Irish Water says the problems were found to be largely within the properties in question - and are the owners' responsibility.
But Westmeath environmental consultant Jack O'Sullivan says that's not good enough, as lead can be very harmful:
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