Irish Water is investigating reports of a strange smell and taste in the drinking supply in parts of Dublin.
However it said that the water is tested daily and is safe to drink.
The company said that it can confirm that drinking water microbiological and chemical analysis carried out on water produced at its water treatment plants serving Dublin is “compliant with drinking water regulations.”
It said water produced at the treatment plants is tested daily in conjunction with extensive monitoring in the distribution network and is safe to drink.
A statement on its website said that: “Some people may be more sensitive to changes in how their drinking water tastes or smells.
“In general terms, a change in the taste or smell of drinking water can indicate a change in the treatment process or can be due to the impact of weather on a water source or the presence of organic matter or minerals that have been picked up as the water flows through the system, none of which poses a risk to drinking water quality.”
Sinn Féin councillor Daithí Doolan said: "I think people were concerned if the water was drinkable or not because it was discoloured and there was a bad taste of mud.
"That's what residents were complaining to me about."
Irish Water said that customers with queries or concerns about the quality of their drinking water should contact the company directly via its customer contact centre which operates 24/7 on 1850 278 278.
Meanwhile, a temporary ‘do not swim’ notice has been put in place at a north Dublin beach because of visual reports of ‘sewage pollution’.
Fingal County Council issued the notice for Loughshinny Beach last Wednesday, to last for six days.
The council said the beach remains open but beach users are asked to respect the ‘Do Not Swim’ notice.