Irish Water is denying media reports it is putting a roof on a Dublin reservoir amid fears of a terrorist attack.

The utility has said the Stillorgan facility is only one of two reservoirs in Ireland that is not yet covered.

A spokesperson for Irish Water has said as the facility serves 200,000 people it is working to bring it up to modern day standard practice.

Head of Major Projects at Irish Water Geoff O’Sullivan said: “Safeguarding the quality of drinking water is a top priority for Irish Water.

“We have committed to investing approximately €80m to ensure the upgrade to the reservoir provides the long term solution that is required to secure the water supply.

“This is part of a national investment plan which is being implemented on the basis of greatest need under our 25 year strategy, the Water Services Strategic Plan.”

A public consultation on the plans is opening today.