County annual report · FIPS 17087
2022 Johnson County, IL Power Outage Report
In 2022, customers in Johnson County, IL went without power for an average of 1.3 hours, a total of 8,683 customer-hours (Illinois average 1.6 hours). That ranks 82nd worst of 102 Illinois counties and 2574th of 2,976 nationally.
Compared with IL, the US and 2021
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Johnson County, 2022
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 21, 2022 20:45 | September 22, 2022 01:00 | 4h 15m | 1,251 | 629 |
| 2 | December 23, 2022 06:45 | December 23, 2022 09:15 | 2h 30m | 1,247 | 1,859 |
| 3 | March 11, 2022 22:00 | March 11, 2022 23:15 | 1h 15m | 272 | 285 |
| 4 | July 2, 2022 18:45 | July 2, 2022 19:45 | 1h | 267 | 137 |
| 5 | December 24, 2022 23:00 | December 27, 2022 13:45 | 2d 14h | 265 | 702 |
| 6 | February 25, 2022 00:15 | February 25, 2022 08:00 | 7h 45m | 163 | 154 |
| 7 | June 26, 2022 18:30 | June 26, 2022 20:30 | 2h | 158 | 278 |
| 8 | August 28, 2022 18:45 | August 28, 2022 20:15 | 1h 30m | 124 | 129 |
| 9 | November 5, 2022 12:00 | November 5, 2022 16:15 | 4h 15m | 118 | 273 |
| 10 | December 31, 2022 15:30 | December 31, 2022 17:00 | 1h 30m | 115 | 145 |
Outage episodes by size in 2022: 12 reached 100+ customers, 2 reached 1,000+ customers, 0 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Johnson County reported on EIA Form 861 for 2022, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Ameren Illinois Company | 2022 | 2.7 hrs | 1.02 | 1.9 hrs | 0.88 |
| Southeastern IL Elec Coop, Inc | 2022 | 2.9 hrs | 1.63 | 2.3 hrs | 1.34 |
| Ameren | - | - | - | - | - |
| Egyptian Electric Coop Assn | - | - | - | - | - |
| Southern Illinois Elec Coop | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 98% of Illinois's customers in 2022; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 6,500 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Johnson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Johnson County, IL annual power outage report, 2022, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2022/illinois/johnson-county