Tipperary County Council is not aware if the source of the cryptosporidium that has affected Borrisokane water supply has been found, local councillors have been told.
Cllr Ger Darcy had also raised concerns as to whether the pollution could happen again.
Irish Water is installing a UV system to kill any bacteria in the supply and director of water services Jerry Robinson said that hopefully that would be done this month, but warned it was a “work in progress”.
He said the UV system should prevent issues in the future.
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