Three public drinking water supplies in Cork were found to contain pesticides last year.
The chemicals were detected in water supplied to Carrignavar, Mogeely and Glanmire.
Water supplies to Carrignavar, Glanmire and Mogeely were found to contain pesticide levels exceeding the regulatory limit last year.
Only the Glanmire supply tested positive for pesticides in 2021.
In a statement to RedFM News, Uisce Éireann’s Regional Drinking Water Compliance Specialist, Deirdre O’Loughlin, said the HSE concluded the levels detected do not represent a threat to public health, but are still "undesirable in drinking water".
The Glanmire water supply is sourced from the Butlerstown River Tributaries, the Mogeely water supply is from the Kiltha river, and Carrignavar's water supply comes from the Knockaneag and Parkview area.
Uisce Éireann is reminding the public to consider alternatives to pesticides when gardening, farming and maintaining sports grounds.
