The Sacramento Bee reported Thursday that the San Juan Water District board of directors approved the move this week.
The district serves more than 265,000 people in the Sacramento suburbs, including the communities of Citrus Heights, Orangevale and Folsom.
Most of its water comes from Folsom Reservoir, which the newspaper says has shrunk perilously low amid one of the driest winters in California history.
District General Manager Shauna Lorance says the call for conservation is not mandatory, but it could become so next month if the area doesn't get rain soon.
The district also is extending a request for a 20 percent cut in all water use that has been in place for months.
What little bit of rain California received in December and February was just enough to help reservoir storage. The Department of Water Resources announced it will increase water deliveries through the State Water Project.
The US Bureau of Reclamation says most farmers south of the Sacramento-San Joaquin Delta will face a second year with no water from the Central Valley Project. Some farmers and cities may receive more.
It would not be an odd sight in the spring. But there is something depressing about a closed ski slope in the middle of winter. The trails are bare and grassy. The chairlifts just hang there, waving a little with the breeze.
A new poll finds nearly all Californians think the state's drought is serious -- and there's growing support for mandatory water rationing.
The California drought has state lawmakers looking for creative and affordable ways to increase the state’s water supply. A legislative hearing Wednesday will highlight ways that could make it easier to capture stormwater.