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.
The drought in California, in its fifth consecutive year, has created conditions that are ripe for wildfires. The National Interagency Fire Center predicts "above normal" fire potential through September for portions of California, Nevada and Idaho.
A new report shows there are certain highways in California that are "hot spots" for wildlife-vehicle collisions.
A new report says more people in California are at risk from wildfire and fires are starting earlier and are three times larger than in the 1970s.
A new study finds California’s Central Valley has three times more water beneath it than previously estimated.
UPDATE June 26: Fire managers says the Erskine Fire near Lake Isabella in Kern County has grown to 43,460 acres and is 40 percent contained. Two people have died, and more than 250 structures have been destroyed and an additional 75 damaged.