massoutage

2021 California Power Outage Report

In 2021, the average California customer went without power for about 6.6 hours — the 15th worst of any US state that year, 1.2× the state's decade average. Figures from DOE/ORNL EAGLE-I.

Avg hrs / customer
6.6
Peak customers out
156,263
Rank (worst state)
15th
Counties affected
20

California outages over the decade

Average hours without power per customer, 2021 highlighted.

3.1h20152.5h20162.2h20173.7h20189.6h20196.3h20206.6h20214.9h20227.9h20236.1h20247.6h2025

Hardest-hit California counties in 2021

By peak customers out during the year's worst event.

1Sacramento County156,2632Los Angeles County114,5773Orange County106,6724Ventura County76,1675Tulare County75,2926San Joaquin County56,8707Alameda County51,8988San Bernardino County49,0719San Mateo County46,91010Santa Clara County39,10811Tuolumne County37,00112Riverside County35,29113Nevada County32,09114Yolo County30,19015El Dorado County27,39216Marin County25,75717Sonoma County24,73618Mono County24,31319Santa Cruz County23,30220San Diego County23,208

Biggest California outages of 2021

CountyBeganPeak customers out
Sacramento CountyJanuary 24, 2021156,263
Los Angeles CountyJanuary 1, 2021114,577
Orange CountyApril 22, 2021106,672
Orange CountyApril 22, 2021106,514
Orange CountyApril 21, 2021103,783
Ventura CountyJanuary 19, 202176,167
Tulare CountyOctober 21, 202175,292
Ventura CountyOctober 4, 202174,381
Los Angeles CountyApril 18, 202164,486
San Joaquin CountyJanuary 25, 202156,870
California by year:20252024202320222020201920182017
Other states in 2021:LAMIWVTXORMS

Part of the 2021 US Power Outage Report. Source: DOE/ORNL EAGLE-I. “Avg hours per customer” is a SAIDI-like measure (outage customer-minutes ÷ tracked customers); coverage varies by year.