County annual report · FIPS 17163
2022 St. Clair County, IL Power Outage Report
In 2022, customers in St. Clair County, IL went without power for an average of 2.8 hours, a total of 261K customer-hours (Illinois average 1.6 hours). That ranks 42nd worst of 102 Illinois counties and 2021st 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 St. Clair 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 | May 19, 2022 11:45 | May 23, 2022 11:15 | 3d 23h | 4,775 | 31K |
| 2 | June 29, 2022 12:30 | June 30, 2022 02:45 | 14h 15m | 4,387 | 4,400 |
| 3 | June 17, 2022 10:30 | June 21, 2022 10:00 | 3d 23h | 3,590 | 57K |
| 4 | March 18, 2022 11:30 | March 18, 2022 21:45 | 10h 15m | 2,759 | 1,767 |
| 5 | February 2, 2022 10:30 | February 3, 2022 11:00 | 1d | 2,659 | 10K |
| 6 | May 24, 2022 13:00 | May 27, 2022 18:30 | 3d 5h | 2,622 | 12K |
| 7 | May 6, 2022 20:45 | May 6, 2022 21:15 | 30m | 2,604 | 1,302 |
| 8 | April 20, 2022 15:30 | April 20, 2022 18:45 | 3h 15m | 2,238 | 768 |
| 9 | August 28, 2022 22:30 | August 30, 2022 02:30 | 1d 4h | 1,919 | 12K |
| 10 | December 6, 2022 12:30 | December 6, 2022 19:45 | 7h 15m | 1,209 | 2,852 |
Outage episodes by size in 2022: 89 reached 100+ customers, 11 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 St. Clair 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 |
| Southwestern Electric Coop Inc - (IL) | 2022 | 10.8 hrs | 3.45 | 7.2 hrs | 2.88 |
| Tri-County Electric Coop, Inc (IL) | 2022 | 3.1 hrs | 1.59 | 68 min | 0.71 |
| Monroe County Elec Coop, Inc | 2018 | 1.6 hrs | 0.84 | 1.6 hrs | 0.84 |
| Ameren | - | - | - | - | - |
| Egyptian Electric Coop Assn | - | - | - | - | - |
| Clinton County Elec Coop, Inc | - | - | - | - | - |
| City of Highland | - | - | - | - | - |
| City of Mascoutah - (IL) | - | - | - | - | - |
| Village of Freeburg - (IL) | - | - | - | - | - |
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 ÷ 94,355 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. St. Clair County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), St. Clair 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/st-clair-county