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.
California needs one and a half times the maximum volume of water in Lake Mead, the largest US reservoir, to end its drought.
A new study by the National Oceanic and Atmospheric Administration says natural occurring climate patterns –not climate change- are the primary drivers of California’s drought.
A Republican- backed drought relief bill for California is headed to the floor of the US House of Representatives for a vote Tuesday. The legislation ignited an hour of debate Monday.
Pollution from abandoned mines in the Sierra Nevada could threaten California's primary water supply.
The City of Roseville hopes to break the 20-percent water conservation mark for the year. The city posted its best conservation mark for the year in November.