CALDWELL, Idaho (CBS2) — Caldwell residents are asked to take extra precautions when drinking tap water.

On Monday, city crews closed water valves as part of a scheduled outage. Additional valves were unexpectedly found to be closed so the planned valve closures led to a loss of water pressure in the mainline.

A mainline pressure drop has the potential to create unsafe drinking water conditions and can pose the risk of drawing in bacteria or contamination from household water supply plumbing or other connected water system elements through backflow.

Subdivisions that are affected are Fairoaks, Stonecreek, Mariah Court, Woodbury Estates, Beechwood, Ison Court, Michala Court, Starlight Park, Starlight Manor, Green Acres Subdivisions, and the Caldwell YMCA.

Those in these subdivisions must boil tap water for three minutes before drinking or use bottled water until notice from the City.

The city says that a chlorine disinfection residual is maintained that is intended to protect drinking water safety if intrusion of potentially contaminated water by backflow occurs.

Mainlines are being flushed at fire hydrants and water samples have been taken to validate drinking water safety.

For more information, please contact City of Caldwell Water Dept. Superintendent Terry Martin at 208-455-4793. You can also monitor this situation here or by visiting www.cityofcaldwell.org.

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