PowerOutageHistory

California Power Outage History

58 counties tracked, 2014–2025. County-level reliability grades and outage frequency below.

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Counties tracked
58
Avg national percentile
35th
Higher = more reliable
Grade F counties
24

California county map

San Benito County: Grade B (click for details)Shasta County: Grade F (click for details)Sierra County: Grade F (click for details)Fresno County: Grade B (click for details)Amador County: Grade F (click for details)El Dorado County: Grade F (click for details)Monterey County: Grade D (click for details)San Bernardino County: Grade C (click for details)Tehama County: Grade F (click for details)Nevada County: Grade F (click for details)Tuolumne County: Grade F (click for details)Santa Barbara County: Grade C (click for details)Trinity CountyStanislaus County: Grade A (click for details)Colusa County: Grade D (click for details)Alpine County: Grade F (click for details)Siskiyou County: Grade F (click for details)Del Norte County: Grade F (click for details)Inyo County: Grade F (click for details)San Joaquin County: Grade B (click for details)Imperial County: Grade B (click for details)Calaveras County: Grade F (click for details)Butte County: Grade F (click for details)Madera County: Grade D (click for details)Ventura County: Grade D (click for details)Orange County: Grade B (click for details)Kern County: Grade B (click for details)Contra Costa County: Grade C (click for details)Kings County: Grade B (click for details)Mendocino County: Grade F (click for details)Sonoma County: Grade F (click for details)Yuba County: Grade F (click for details)Merced County: Grade B (click for details)Tulare County: Grade C (click for details)Sacramento County: Grade C (click for details)Solano County: Grade C (click for details)San Francisco County: Grade B (click for details)Mariposa County: Grade F (click for details)Marin County: Grade F (click for details)Sutter County: Grade B (click for details)Lassen County: Grade A (click for details)Riverside County: Grade C (click for details)Plumas County: Grade F (click for details)Santa Clara County: Grade C (click for details)Placer County: Grade D (click for details)San Luis Obispo County: Grade C (click for details)San Mateo County: Grade D (click for details)Mono County: Grade F (click for details)San Diego County: Grade B (click for details)Napa County: Grade F (click for details)Alameda County: Grade B (click for details)Yolo County: Grade D (click for details)Lake County: Grade F (click for details)Los Angeles County: Grade C (click for details)Glenn County: Grade D (click for details)Santa Cruz County: Grade F (click for details)Humboldt County: Grade F (click for details)Modoc County: Grade B (click for details)

Hover a county for its reliability grade

Reliability grade:ABCDF

County rankings (worst to best)

CountyGradeNational percentile
Sierra CountyF0th
Plumas CountyF1st
Mariposa CountyF1st
Calaveras CountyF1st
Amador CountyF1st
Tuolumne CountyF1st
Butte CountyF1st
El Dorado CountyF2nd
Lake CountyF2nd
Nevada CountyF2nd
Alpine CountyF2nd
Mendocino CountyF5th
Humboldt CountyF5th
Del Norte CountyF6th
Santa Cruz CountyF6th
Tehama CountyF7th
Napa CountyF7th
Shasta CountyF9th
Sonoma CountyF13th
Yuba CountyF15th
Marin CountyF16th
Inyo CountyF16th
Mono CountyF19th
Siskiyou CountyF20th
Madera CountyD27th
Monterey CountyD27th
Colusa CountyD28th
Placer CountyD29th
Glenn CountyD32nd
San Mateo CountyD32nd
Ventura CountyD35th
Yolo CountyD40th
San Bernardino CountyC41st
Los Angeles CountyC42nd
Solano CountyC44th
Riverside CountyC45th
San Luis Obispo CountyC48th
Santa Barbara CountyC48th
Tulare CountyC56th
Santa Clara CountyC56th
Contra Costa CountyC59th
Sacramento CountyC59th
Kern CountyB60th
San Diego CountyB61st
Sutter CountyB64th
Orange CountyB65th
San Joaquin CountyB65th
Alameda CountyB68th
Merced CountyB70th
Fresno CountyB71st
San Francisco CountyB73rd
Imperial CountyB75th
Modoc CountyB75th
Kings CountyB78th
San Benito CountyB80th
Lassen CountyA96th
Stanislaus CountyA97th
Trinity CountyNot ranked—