massoutage

2018 Illinois Power Outage Report

In 2018, the average Illinois customer went without power for about 2.5 hours — the 30th worst of any US state that year, below the state's decade average. Figures from DOE/ORNL EAGLE-I.

Avg hrs / customer
2.5
Peak customers out
101,662
Rank (worst state)
30th
Counties affected
20

Illinois outages over the decade

Average hours without power per customer, 2018 highlighted.

2.3h20151.5h20161.4h20172.5h20181.8h20195.9h20202.3h20211.6h20224.0h20233.0h20242.5h2025

Hardest-hit Illinois counties in 2018

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

1Cook County101,6622St. Clair County28,7503DuPage County27,2784McHenry County24,4315Madison County21,1656Kendall County21,0677Lake County20,5138Kane County15,4889Will County14,42510McLean County9,59311Williamson County7,50412Peoria County6,44013Jefferson County6,19114Rock Island County5,79415Champaign County5,63616LaSalle County5,60217Clay County5,58918Clinton County5,25919Lawrence County5,25020Union County4,715

Biggest Illinois outages of 2018

CountyBeganPeak customers out
Cook CountyNovember 23, 2018101,662
St. Clair CountyJune 26, 201828,750
DuPage CountyNovember 25, 201827,278
McHenry CountySeptember 25, 201824,431
Madison CountyJune 28, 201821,165
Kendall CountyJanuary 10, 201821,067
Lake CountyNovember 25, 201820,513
Kane CountyAugust 29, 201815,488
Cook CountyMay 1, 201814,659
Will CountyOctober 20, 201814,425
Illinois 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.