County annual report · FIPS 17163
2019 St. Clair County, IL Power Outage Report
In 2019, customers in St. Clair County, IL went without power for an average of 2.4 hours, a total of 227K customer-hours (Illinois average 1.8 hours). That ranks 57th worst of 102 Illinois counties and 1881st of 2,945 nationally.
Compared with IL, the US and 2018
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in St. Clair County, 2019
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 21, 2019 17:45 | June 25, 2019 00:30 | 3d 6h | 5,379 | 23K |
| 2 | June 25, 2019 06:45 | June 28, 2019 11:30 | 3d 4h | 2,532 | 11K |
| 3 | June 1, 2019 07:15 | June 5, 2019 06:00 | 3d 22h | 2,417 | 16K |
| 4 | August 12, 2019 08:30 | August 14, 2019 09:15 | 2d | 2,133 | 7,472 |
| 5 | August 10, 2019 07:30 | August 10, 2019 18:30 | 11h | 2,105 | 6,751 |
| 6 | November 26, 2019 21:00 | November 28, 2019 07:00 | 1d 10h | 1,650 | 12K |
| 7 | July 10, 2019 14:15 | July 11, 2019 12:00 | 21h 45m | 1,543 | 4,029 |
| 8 | April 14, 2019 07:45 | April 15, 2019 03:30 | 19h 45m | 1,409 | 10K |
| 9 | April 15, 2019 06:15 | April 16, 2019 02:15 | 20h | 1,395 | 6,562 |
| 10 | March 4, 2019 17:45 | March 6, 2019 20:15 | 2d 2h | 1,350 | 1,790 |
Outage episodes by size in 2019: 82 reached 100+ customers, 14 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 2019, 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 | 2018 | 3.5 hrs | 1.06 | 1.8 hrs | 0.90 |
| Southwestern Electric Coop Inc - (IL) | 2018 | 4.6 hrs | 1.89 | 4.6 hrs | 1.89 |
| Tri-County Electric Coop, Inc (IL) | 2018 | 4.7 hrs | 1.74 | 83 min | 0.81 |
| 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 99% of Illinois's customers in 2019; 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, 2019, 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/2019/illinois/st-clair-county