The Black Mountain Irrigation District has issued a boil water notice for all users on the water system.
The district says that the notice was issued because of a malfunction of a valve regulating the flow of treated water into the distribution system from Mission Creek.
The failure is preventing the valve from opening sufficiently to meet the increased demand from warm temperatures and increasing seasonal demand.
To maintain water supply to the district it is necessary to bypass the water treatment plant and use untreated water directly from Mission Creek, the district says.
advertisement The water quality in Mission Creek is particularly poor right now due to spring runoff.
During a boil water notice, tap water used for drinking, brushing teeth, or rinsing ready-to-eat-foods should be brought to a rolling boil for one minute.
The boil water advisory is in effect until further notice.
The location of the valve and the time it will take once it is repaired to refill reservoirs and flush out the distribution system with treated water will likely take about two weeks.