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.
A winter forecast from NOAA's Climate Prediction Center Thursday shows the California drought may persist or intensify in parts of the state.
The Center for Biological Diversity filed notice of intent to sue the U.S. Fish and Wildlife Service Tuesday for not responding to a petition to protect 16 amphibian and reptile species in California
The Sacramento Region may get millions of dollars for water projects to help during the drought.
California has received less than 60 percent of the rain and snow this water year that it normally gets. Water managers are warning the new water year may be just as bad.
New motors, screens, and some casing repairs are in the works for eight of Sacramento's water wells. Some of the wells are more than 400-feet deep.