Perris

Hydro power plant · Riverside County, California

Nameplate capacity
7.9 MW
Rank in California
#894
of 1,897 plants
In service since
1983
May 1983

Details

Primary fuel
Hydro
Technology
Conventional Hydroelectric
Operator
Metropolitan Water District of S CA
County
Riverside County
Generating units
1
Share of state capacity
0.01%
Rank among hydro plants in California
#137 of 244
EIA plant code
481

Generating units

Individual generating units at Perris
UnitTechnologyNameplateSummerOnlineStatus
1Conventional Hydroelectric7.9 MW7.9 MW1983Operating

Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.

Similarly sized plants in California

About this data

From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 7.9 MW solar plant and a 7.9 MW nuclear plant have the same entry here and produce very different amounts of electricity.

“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All California power plants · What California actually generates