Power outages in Illinois, by utility
Across 16 Illinois utilities that reported to the federal government, the median customer went without power for 2.7 hours in 2025 — that is 1.1× better than the national median. Illinois ranks #26 of 41 states for outage time, worst first.
- Median utility
- 2.7 hrs
- typical customer
- Worst utility
- 36.9 hrs
- Southeastern IL Elec Coop, Inc
- Best utility
- 0.3 hrs
- Rock Energy Cooperative
- Utilities reporting
- 16
- of 752 nationwide
Every reporting Illinois utility, worst outage time first
| # | Utility | Outage time/yr | Outages/yr | vs US median |
|---|---|---|---|---|
| 1 | Southeastern IL Elec Coop, IncCooperative | 36.9 hrs2214 min | 3.9 | 12.4× worse |
| 2 | Corn Belt Energy CorporationCooperative | 22.7 hrs1365 min | 7.7 | 7.7× worse |
| 3 | Egyptian Electric Coop AssnCooperative | 12.9 hrs773 min | 4.6 | 4.3× worse |
| 4 | MidAmerican Energy CoInvestor Owned | 5.1 hrs304 min | 1.9 | 1.7× worse |
| 5 | Ameren Illinois CompanyInvestor Owned | 4.8 hrs287 min | 1.2 | 1.6× worse |
| 6 | Southwestern Electric Coop Inc - (IL)Cooperative | 4 hrs241 min | 1.9 | 1.4× worse |
| 7 | Eastern Illinois Elec CoopCooperative | 3.7 hrs223 min | 2.2 | 1.3× worse |
| 8 | Menard Electric CoopCooperative | 3.1 hrs186 min | 2.3 | 1.0× worse |
| 9 | Jo-Carroll Energy, IncCooperative | 2.3 hrs138 min | 0.5 | 1.3× better |
| 10 | Tri-County Electric Coop, Inc (IL)Cooperative | 2.2 hrs132 min | 1.6 | 1.4× better |
| 11 | City of Batavia - (IL)Municipal | 1.5 hrs91 min | 0.6 | 2.0× better |
| 12 | Rochelle Municipal Utilities - (IL)Municipal | 1.5 hrs90 min | 0.3 | 2.0× better |
| 13 | Commonwealth Edison CoInvestor Owned | 1.3 hrs77 min | 0.7 | 2.3× better |
| 14 | City of Geneva - (IL)Municipal | 0.6 hrs38 min | 1.0 | 4.6× better |
| 15 | City of Naperville - (IL)Municipal | 0.3 hrs20 min | 0.3 | 8.8× better |
| 16 | Rock Energy CooperativeCooperative | 0.3 hrs16 min | 0.4 | 11.0× better |
Outage time is SAIDI: the average minutes a customer went without power across the year, storms and major events included. Outages/yr is SAIFI. The US median across all reporting utilities is 3 hours (178 minutes).
What these numbers do and do not say
SAIDI counts the minutes an average customer spent without power over the year, including storms and other major events. We rank on the figure that includes them, because excluding storms would describe a year nobody actually lived through.
Utilities report these numbers themselves, and smaller co-ops and municipal systems often serve rural territory where a single line fault affects a large share of customers. A high number is not automatically mismanagement — but it is still the power you did not have.
Utilities that filed no reliability data are left out entirely rather than counted as zero.