massoutage

2015 Illinois Power Outage Report

In 2015, the average Illinois customer went without power for about 2.3 hours — the 28th worst of any US state that year, below the state's decade average. Figures from DOE/ORNL EAGLE-I.

Avg hrs / customer
2.3
Peak customers out
144,538
Rank (worst state)
28th
Counties affected
20

Illinois outages over the decade

Average hours without power per customer, 2015 highlighted.

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

Hardest-hit Illinois counties in 2015

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

1Cook County144,5382DuPage County26,8743Peoria County23,2614Will County22,5985Adams County21,6886Tazewell County18,6807McHenry County16,1518St. Clair County14,4679Kane County14,05110Lake County12,91711Madison County12,26712McLean County10,08913Christian County8,14214Coles County8,07815Livingston County8,05716Rock Island County7,71317Woodford County7,53618Macon County7,29019Grundy County6,91120Warren County6,801

Biggest Illinois outages of 2015

CountyBeganPeak customers out
Cook CountyMarch 11, 2015144,538
Cook CountyJuly 19, 201538,285
DuPage CountyMarch 9, 201526,874
Peoria CountyDecember 24, 201523,261
Will CountyMarch 9, 201522,598
Adams CountyJuly 12, 201521,688
Tazewell CountyDecember 26, 201518,680
McHenry CountyJune 8, 201516,151
Will CountyMarch 12, 201514,917
St. Clair CountyJune 20, 201514,467
Illinois by year:20252024202320222021202020192018
Other states in 2015:WVWANCMIRILA

Part of the 2015 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.