Trace amounts of manganese are needed for human health, but repeated consumption of high levels is linked to neurological conditions.

The facility provides drinking water to a population of almost 144,000 in Cork city and the wider Cork Harbour area

Concerns have been raised that many private supplies are not registered, despite serving schools, nursing homes, sports clubs and self-catering accommodation.

Irish Water said every single one of the incidents had been investigated but there was no verified illness related to any of the queries received.

Minister Andrew Muir met with stakeholders following the publication of a Lough Neagh Action Plan.

The Court of Justice of the EU ruled the concentration of trihalomethanes in a large number of public drinking water supplies in the Republic have persistently exceeded recommended safety limits