Water Supply

Lake Mendocino: (September 2018)  

The region has had a dry winter and spring, with "Miracle March" rains providing the dominant precipitation during this last water year. The amount of water in Lake Mendocino is higher than average, with over 63,000 acre-feet still in the lake. The state of California and Mendocino County are no longer facing drought conditions but continue to use better water management techniques to prepare for its return. To assist in better management of water storage in Lake Mendocino, the Sonoma County Water Agency filed its 2018 Temporary Use Change Petition and revised minimum instream flows in the Russian River to 125 cfs. The lower flows have helped conserve water in the lake for downstream diverters through the hottest times of the year.

Managing flows at the lower levels can be difficult; releases from the lake for downstream users can take several days to reach where needed. To continue better water supply management policies, improve fish habitat and conserve storage in Lake Mendocino, we ask that RRFC contractors notify the Sonoma County Water Agency of intended diversions. As in previous years, notification can easily be done by using the online tool at the Upper Russian River Mendocino Diversion Forecasts website to report your planned diversions.

In addition, we are continuing to urge all diverters in the Upper Basin to use our water resources wisely and conserve whenever possible.

Additional water supply information is available here http://www.scwa.ca.gov/current-water-supply-levels/.