Outage Almanac

California power outages

58 counties with outage records. Pick one to see its history.

California averaged 0.90 times the US outage time per person

That ranks 22 of 50 states and DC, where 1 has the most. October and January made up 35% of outage time. Records run from 2015 to 2023, and some counties start later.

Plumas County had the most outage time per resident of 55 rated counties.

Counties ranked by outage time

RankCountyMajor outages per yearLongest (hours)Times US rate
1Plumas County10.957016.30
2Calaveras County16.212612.93
3Tuolumne County9.714912.86
4Mariposa County9.316112.21
5Nevada County10.813710.47
6Amador County8.31389.97
7Lake County8.31589.02
8Butte County10.52107.86
9El Dorado County12.72357.18
10Humboldt County14.82356.22
11Mendocino County6.21965.70
12Del Norte County4.71785.65
13Shasta County8.32444.41
14Santa Cruz County11.22214.36
15Napa County10.52214.33
16Tehama County7.8963.95
17Trinity County4.31502.98
18Sonoma County8.01502.67
19Marin County5.7482.62
20Yuba County6.51062.52
21Siskiyou County3.43262.18
22Madera County4.52131.75
23San Mateo County4.7641.36
24Monterey County7.0721.32
25Colusa County2.3361.20
25Glenn County4.7281.20
27Placer County2.91081.11
28Solano County4.2460.96
29Yolo County2.21320.91
30San Luis Obispo County4.8460.90
31Ventura County2.41190.89
32Inyo County1.9640.88
33San Bernardino County1.41860.79
34Santa Barbara County2.4560.69
35Los Angeles County0.6470.63
36Alameda County2.2470.59
36Contra Costa County2.1660.59
38San Joaquin County1.7660.57
39Sutter County2.3490.53
40Tulare County1.11780.51
41Riverside County0.32440.48
41Sacramento County1.81360.48
41Santa Clara County1.61170.48
44San Diego County0.3860.45
45Kern County1.4660.44
46Fresno County0.9440.38
46Orange County0.2170.38
48San Francisco County2.0260.36
49Merced County1.3330.34
50Imperial County0.62460.32
51Modoc County0.0None0.27
52Kings County1.3160.26
53San Benito County0.5180.22
54Lassen County0.4150.08
55Stanislaus County0.2180.05

Rank uses outage time per resident. Times US rate compares each county with the national average.

When outages hit California

Share of the state's customer-hours by month.

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20%
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JanJFebFMarMAprAMayMJunJJulJAugASepSOctONovNDecD

Not rated

These counties have short histories, very small populations, or customer counts that look too high for the population.