County annual report · FIPS 17163
2024 St. Clair County, IL Power Outage Report
In 2024, customers in St. Clair County, IL went without power for an average of 3.3 hours, a total of 315K customer-hours (Illinois average 3.0 hours). That ranks 48th worst of 102 Illinois counties and 2011th of 2,990 nationally.
Compared with IL, the US and 2023
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in St. Clair County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 15, 2024 08:00 | July 19, 2024 03:15 | 3d 19h | 4,529 | 43K |
| 2 | March 8, 2024 01:15 | March 8, 2024 11:15 | 10h | 4,009 | 4,239 |
| 3 | July 8, 2024 22:30 | July 12, 2024 14:45 | 3d 16h | 3,953 | 13K |
| 4 | May 8, 2024 09:45 | May 10, 2024 19:15 | 2d 9h | 3,033 | 11K |
| 5 | January 25, 2024 05:00 | January 25, 2024 19:45 | 14h 45m | 2,931 | 2,238 |
| 6 | May 26, 2024 12:00 | May 29, 2024 10:00 | 2d 22h | 2,824 | 41K |
| 7 | July 28, 2024 21:45 | July 29, 2024 09:15 | 11h 30m | 2,775 | 12K |
| 8 | April 18, 2024 14:15 | April 21, 2024 07:15 | 2d 17h | 2,334 | 32K |
| 9 | June 12, 2024 11:00 | June 14, 2024 18:45 | 2d 7h | 1,920 | 3,294 |
| 10 | April 17, 2024 13:15 | April 18, 2024 01:15 | 12h | 1,883 | 2,375 |
Outage episodes by size in 2024: 94 reached 100+ customers, 17 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 2024, 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 | 2024 | 3.7 hrs | 1.13 | 2.0 hrs | 0.91 |
| Southwestern Electric Coop Inc - (IL) | 2024 | 5.1 hrs | 2.21 | 4.4 hrs | 1.78 |
| Egyptian Electric Coop Assn | 2024 | 2.1 hrs | - | - | - |
| Tri-County Electric Coop, Inc (IL) | 2024 | 6.2 hrs | 2.50 | 64 min | 0.73 |
| Monroe County Elec Coop, Inc | 2018 | 1.6 hrs | 0.84 | 1.6 hrs | 0.84 |
| Ameren | - | - | - | - | - |
| 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 n/a of Illinois's customers in 2024; 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, 2024, 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/2024/illinois/st-clair-county