massoutage

2018 California Power Outage Report

In 2018, the average California customer went without power for about 3.7 hours — the 25th worst of any US state that year, below the state's decade average. Figures from DOE/ORNL EAGLE-I.

Avg hrs / customer
3.7
Peak customers out
109,409
Rank (worst state)
25th
Counties affected
20

California outages over the decade

Average hours without power per customer, 2018 highlighted.

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

Hardest-hit California counties in 2018

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

1Los Angeles County109,4092San Bernardino County57,7943Sacramento County39,4774Riverside County38,5395San Mateo County33,7716Mendocino County31,8777San Diego County30,0308El Dorado County27,8339Contra Costa County26,06810Butte County25,69611Santa Clara County19,58712Sonoma County18,92513Solano County15,56114Ventura County15,27215Kern County14,28616Alameda County14,25517Santa Barbara County13,90218San Luis Obispo County13,83019Amador County13,10720Tehama County12,143

Biggest California outages of 2018

CountyBeganPeak customers out
Los Angeles CountySeptember 21, 2018109,409
San Bernardino CountyJuly 13, 201857,794
Sacramento CountyApril 16, 201839,477
Riverside CountySeptember 26, 201838,539
Los Angeles CountyJanuary 7, 201836,761
Los Angeles CountyJune 22, 201835,109
San Mateo CountyDecember 9, 201833,771
Mendocino CountyJuly 27, 201831,877
Los Angeles CountyNovember 10, 201831,543
Los Angeles CountySeptember 15, 201830,209
California by year:20252024202320222021202020192017
Other states in 2018:NCVAWVMARIVT

Part of the 2018 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.