BOULDER, Colo. -- Officials believe the issue of cloudiness in water in Boulder has been cleared up after the main lines were flushed Tuesday.
Residents were warned not to drink the tap water after construction at Boulder's water plant caused the cloudiness. In some parts of the city, the tap water turned brown.
The cloudiness came from sediment that was stirred up from the bottom of a treated water storage tank during work to prepare for construction at the Betasso Water Treatment Facility.
A calcium additive was added to adjust the pH of the water and it settled to the bottom of the tank.
Officials said some neighborhoods might still see some effects and if they do, they should call the city's Utilities Division at 303-441-3249 and wait 30 minutes before attempting to flush the water again.
As a precaution, residents should not drink the water unless it is clear.
Some residents in southeast Boulder might also see a brown coloration in the water. That is a different issued caused by a failed control valve. Crews worked to fix that issue.
The number of households affected has not been released.