The Ukiah Daily Journal reports that the county's Board of Supervisors on Tuesday voted unanimously to make the declaration, citing an "imminent threat of disaster" from drought conditions.
The state Department of Water Resources said Mendocino is the first to request state drought assistance.
Officials hope the declaration will result in state funds and assistance in developing a drought plan.
Gov. Jerry Brown has convened a task force to help decide if a statewide drought emergency is warranted.
State water managers say they will be able to deliver just 5 percent of the water sought by municipal agencies and nearly a million acres of farmland.
The City of Sacramento Department of Utilities reports Friday that city water customers saved more than one-billion gallons of water last month.
California's economy will see modest growth in 2015, with jobs in home building being a bright spot, and the drought having slight impact, according to the latest University of the Pacific's latest Business Forecast.
It appears messages about the need for water conservation are beginning to get through to Californians.
There’s been a drilling frenzy for water in the San Joaquin Valley during the drought. And it’s evident in the number of well permits issued by eight Central Valley counties. Capital Public Radio obtained the data from each county.
(AP) — The 6.0-magnitude earthquake in Northern California on August 24 is credited for shaking loose at least 200,000 gallons of groundwater a day, filling dry creek beds and parched streams.