massoutage

2021 California Power Outage Report

In 2021, the average California customer went without power for about 6.6 hours, the 15th worst of 51 states (US average 8.4 hours). Figures from DOE/ORNL EAGLE-I, including major storm days.

Avg hrs / customer
6.6
vs prior year
▲ 6%
vs 2020
Customer-hours out
104.5M
Peak customers out
405,067
across the state at once
EAGLE-I coverage
95%
of CA customers
Counties reporting
58

California year over year

California: average hours without power per customer by year2015: 3.1h; 2016: 2.5h; 2017: 2.2h; 2018: 3.7h, coverage 91%; 2019: 9.3h, coverage 93%; 2020: 6.2h, coverage 94%; 2021: 6.6h, coverage 95%; 2022: 4.9h, coverage 95%; 2023: 7.9h; 2024: 6.1h; 2025: 7.5h02.557.5100%50%100%3.1h20152.5h20162.2h20173.7h20189.3h20196.2h20206.6h20214.9h20227.9h20236.1h20247.5h2025
Use the arrow keys to read values.
Average hours without power per customer. Line: EAGLE-I coverage, share of customers tracked (right axis).

Month by month, 2021

Customer-hours without power across California; January was the worst.

CSVJSON
California customer-hours without power by month, 2021Jan 20.8M, Feb 4.4M, Mar 4.5M, Apr 4.6M, May 4.1M, Jun 5.4M, Jul 5.7M, Aug 11.9M, Sep 9.0M, Oct 13.6M, Nov 4.6M, Dec 15.8M010M20M30M20.8MJan4.4MFeb4.5MMar4.6MApr4.1MMay5.4MJun5.7MJul11.9MAug9.0MSep13.6MOct4.6MNov15.8MDec
Use the arrow keys to read values.

All 58 California counties, 2021

Ranked by average hours without power per customer. Each county links to its annual report.

CSVJSON
#CountyHrs / customerCustomer-hoursCustomersPeak outEvents
1Plumas County392.13.6M9,2309,230189
2Alpine County176.4156K88288255
3Mariposa County136.1989K7,2627,262404
4Calaveras County124.92.3M18,41712,965449
5Sierra County121.6252K2,0721,595130
6Tuolumne County113.92.7M23,61023,610534
7El Dorado County64.76.2M95,67227,392306
8Amador County58.1991K17,05010,852395
9Nevada County55.72.9M52,25132,091468
10Mendocino County35.51.4M39,04110,320381
11Mono County34.4191K5,5515,551226
12Humboldt County32.51.9M59,96211,724415
13Tehama County31.8894K28,13411,358509
14Lake County28.1799K28,39712,827515
15Santa Cruz County22.32.6M118,29923,302363
16Shasta County20.01.6M81,28220,766389
17Madera County17.51.2M68,50314,275573
18Colusa County17.2172K9,9703,767399
19Butte County15.61.4M90,54314,476478
20Yuba County15.0540K35,93311,719559
21Glenn County14.8181K12,2333,279438
22Yolo County14.71.5M101,50930,190503
23Ventura County14.04.4M317,65876,167471
24Placer County11.42.1M187,52516,918229
25Napa County10.6677K63,8288,080489
26Siskiyou County9.6255K26,60511,452683
27Del Norte County9.5153K16,19512,767445
28Sonoma County8.61.8M214,12724,736399
29San Luis Obispo County8.41.1M125,72712,574454
30San Mateo County8.22.7M328,40846,910295
31Merced County7.9441K56,07711,688620
32Marin County7.8883K113,04425,757549
33Inyo County6.749K7,2014,614140
34Solano County6.71.3M187,69021,975383
35San Bernardino County6.65.6M840,55549,071221
36San Joaquin County6.22.0M324,54356,870382
37Monterey County6.01.2M195,57515,959303
38Riverside County5.54.7M853,92335,291219
39Sacramento County5.43.4M625,566156,263608
40Sutter County5.2221K42,3234,986573
41San Francisco County5.11.1M209,75311,384763
42Tulare County4.8905K186,93975,292419
43Santa Barbara County4.7898K192,0807,938482
44Contra Costa County4.32.1M486,94520,039298
45Imperial County4.0292K72,6912,95663
46Kern County3.91.5M395,01510,006354
47Los Angeles County3.814.5M3,762,600114,57712
48Fresno County3.81.7M458,08414,099204
49Santa Clara County3.73.1M844,71539,108128
50Alameda County3.22.4M751,61651,898241
51Orange County3.24.0M1,255,530106,672386
52San Diego County2.93.9M1,362,92923,208253
53Kings County2.8179K62,99822,092509
54San Benito County2.771K26,7031,686374
55Modoc County2.114K6,5982,714145
56Lassen County0.914K15,44023236
57Stanislaus County0.6125K219,1566,108526
58Trinity County-205K-1,413153

Biggest California outages of 2021

Up to 25 county outage episodes with the most customers out at once.

CSVJSON
#CountyStarted (UTC)Ended (UTC)DurationPeak outCustomer-hours
1Sacramento County, CAJanuary 24, 2021 08:45February 1, 2021 11:158d 2h156,2632.4M
2Los Angeles County, CAJanuary 1, 2021 00:00April 4, 2021 10:3093d 10h114,5773.9M
3Orange County, CAApril 22, 2021 03:15April 22, 2021 11:158h106,672290K
4Orange County, CAApril 22, 2021 15:15April 24, 2021 03:151d 12h106,514358K
5Orange County, CAApril 21, 2021 06:00April 22, 2021 01:1519h 15m103,783395K
6Ventura County, CAJanuary 19, 2021 13:30January 22, 2021 06:452d 17h76,1671.7M
7Tulare County, CAOctober 21, 2021 05:00November 25, 2021 09:4535d 4h75,292118K
8Ventura County, CAOctober 4, 2021 15:30October 9, 2021 14:004d 22h74,381629K
9Los Angeles County, CAApril 18, 2021 02:15August 22, 2021 10:45126d 8h64,4864.8M
10San Joaquin County, CAJanuary 25, 2021 15:30January 31, 2021 06:455d 15h56,8701.3M
11Alameda County, CAJune 17, 2021 14:45June 20, 2021 06:002d 15h51,89882K
12Sacramento County, CAOctober 24, 2021 11:30October 26, 2021 09:001d 21h51,31369K
13San Bernardino County, CAMay 24, 2021 05:00May 26, 2021 13:302d 8h49,07195K
14San Mateo County, CAOctober 21, 2021 05:00November 9, 2021 11:1519d 6h46,9101.1M
15Orange County, CAAugust 31, 2021 13:15September 1, 2021 11:4522h 30m42,56426K
16Santa Clara County, CAJanuary 18, 2021 10:45February 4, 2021 09:3016d 22h39,108641K
17San Mateo County, CASeptember 25, 2021 02:45September 26, 2021 04:151d 1h36,08060K
18Santa Clara County, CAOctober 21, 2021 05:00November 7, 2021 07:0017d 2h35,417734K
19Riverside County, CASeptember 30, 2021 15:30October 6, 2021 11:455d 20h35,29163K
20Los Angeles County, CAAugust 24, 2021 12:30October 21, 2021 02:0057d 13h35,2422.7M
21Nevada County, CADecember 24, 2021 06:45December 31, 2021 00:156d 17h32,0912.1M
22Orange County, CAJanuary 15, 2021 13:30January 15, 2021 13:4515m31,6787,920
23Yolo County, CAJanuary 27, 2021 02:15February 3, 2021 06:307d 4h30,1901.2M
24Sacramento County, CADecember 13, 2021 11:00December 15, 2021 07:451d 20h28,570101K
25Ventura County, CAJanuary 28, 2021 15:45January 28, 2021 16:0015m28,3107,078
EAGLE-I tracked about 95% of California's electricity customers in 2021; outages at utilities it does not see are not counted. Hours per customer divide outage customer-minutes by modeled county customers.
California by year:2025202420232022202020192018201720162015
Other states in 2021:LAMIWVORTXMSKYNC

Part of the 2021 US Power Outage Report.

Data from DOE EAGLE-I, every source we read.