MLA Maurice Bradley is reassuring constituents about drinking water quality after several complaints about the odour and taste of tap water in the Coleraine and Portrush areas.
Bradley said: “I was in contact with NI Water this morning and I have been assured that the matter is being investigated.
“Residents that were in contact with my office raised concerns about the fitness of the water for drinking, however I have been assured that there is no health risk despite the fact that there is a taste/smell to some household water sources.”
In a statement, NI Water said: “NI Water are aware of and apologise for problems that may be affecting some customers served by the Ballinress Water Treatment Works.
“NI Water would like to make it clear that this issue is not related to any spillage in the River Bann.
“The River Bann is only one of the sources which replenishes Ballinrees raw water reservoir. The unusual taste and/or odour, which has been described as earthy or musty being experienced by some customers recently is related to higher than usual levels of naturally occurring algae in the raw water feeding the water treatment works. High levels of algae result from prolonged warm weather, as we have had this summer.
“NI Water has stepped up operational activities at the plant and has a team working to reduce the impact on the final water leaving the Works. We have also carried out testing of the water supply and can reassure customers that there is no risk to their health. While the remedial action being taken has resolved the issue at the plant, the odour and taste issues may continue for a number of days within the distribution network.”