Residents in the Lookout Mountain Water District have been asked to conserve water as much as possible because of problems in the system created by heavy rainfall in recent days.
Erosion on Beaver Brook Canyon Road has uncovered the main water line, creating the risk of it breaking, said Christina Shea, administrator for the water district.
"The main pipeline is not supported," she said.
Although the district does have treated water stored in tanks for residents to use, if it became depleted, there would be no source of water, Shea said.
There is no problem with the water quality, or any boil advisory, she said.
"Our concern is with delivery."
Repairs are expected to take several days, and in the meantime the district is working on finding an emergency source of water, Shea said.
Affected areas of the water district are from north of I-70 to the face of Golden Gate Canyon and west of Mother Cabrini to the Genesee exit.
For more information, visit www.lookoutwaterdistrict.org or call 303-526-2025.