California Power Outage History
58 counties tracked, 2014–2025. County-level reliability grades and outage frequency below.
Counties tracked
58
Avg national percentile
35th
Higher = more reliable
Grade F counties
24
County rankings (worst to best)
| County | Grade | National percentile |
|---|---|---|
| Sierra County | F | 0th |
| Plumas County | F | 1st |
| Mariposa County | F | 1st |
| Calaveras County | F | 1st |
| Amador County | F | 1st |
| Tuolumne County | F | 1st |
| Butte County | F | 1st |
| El Dorado County | F | 2nd |
| Lake County | F | 2nd |
| Nevada County | F | 2nd |
| Alpine County | F | 2nd |
| Mendocino County | F | 5th |
| Humboldt County | F | 5th |
| Del Norte County | F | 6th |
| Santa Cruz County | F | 6th |
| Tehama County | F | 7th |
| Napa County | F | 7th |
| Shasta County | F | 9th |
| Sonoma County | F | 13th |
| Yuba County | F | 15th |
| Marin County | F | 16th |
| Inyo County | F | 16th |
| Mono County | F | 19th |
| Siskiyou County | F | 20th |
| Madera County | D | 27th |
| Monterey County | D | 27th |
| Colusa County | D | 28th |
| Placer County | D | 29th |
| Glenn County | D | 32nd |
| San Mateo County | D | 32nd |
| Ventura County | D | 35th |
| Yolo County | D | 40th |
| San Bernardino County | C | 41st |
| Los Angeles County | C | 42nd |
| Solano County | C | 44th |
| Riverside County | C | 45th |
| San Luis Obispo County | C | 48th |
| Santa Barbara County | C | 48th |
| Tulare County | C | 56th |
| Santa Clara County | C | 56th |
| Contra Costa County | C | 59th |
| Sacramento County | C | 59th |
| Kern County | B | 60th |
| San Diego County | B | 61st |
| Sutter County | B | 64th |
| Orange County | B | 65th |
| San Joaquin County | B | 65th |
| Alameda County | B | 68th |
| Merced County | B | 70th |
| Fresno County | B | 71st |
| San Francisco County | B | 73rd |
| Imperial County | B | 75th |
| Modoc County | B | 75th |
| Kings County | B | 78th |
| San Benito County | B | 80th |
| Lassen County | A | 96th |
| Stanislaus County | A | 97th |
| Trinity County | Not yet graded | — |