County annual report · FIPS 17163
2017 St. Clair County, IL Power Outage Report
In 2017, customers in St. Clair County, IL went without power for an average of 0.8 hours, a total of 78K customer-hours (Illinois average 1.4 hours). That ranks 65th worst of 102 Illinois counties and 2126th of 2,786 nationally.
Compared with IL, the US and 2016
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in St. Clair County, 2017
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 15, 2017 01:15 | January 19, 2017 23:00 | 4d 21h | 4,258 | 4,355 |
| 2 | April 28, 2017 13:45 | May 1, 2017 13:00 | 2d 23h | 4,248 | 12K |
| 3 | October 20, 2017 12:15 | October 22, 2017 01:30 | 1d 13h | 3,608 | 6,543 |
| 4 | March 10, 2017 12:30 | March 10, 2017 15:30 | 3h | 2,034 | 799 |
| 5 | March 31, 2017 14:00 | March 31, 2017 14:45 | 45m | 1,780 | 1,335 |
| 6 | April 22, 2017 22:30 | April 23, 2017 20:00 | 21h 30m | 1,287 | 2,900 |
| 7 | December 23, 2017 04:30 | December 23, 2017 10:00 | 5h 30m | 1,275 | 6,368 |
| 8 | December 12, 2017 23:30 | December 13, 2017 19:15 | 19h 45m | 1,220 | 1,250 |
| 9 | November 14, 2017 22:45 | November 14, 2017 23:30 | 45m | 1,176 | 295 |
| 10 | October 25, 2017 09:15 | October 25, 2017 09:45 | 30m | 949 | 443 |
Outage episodes by size in 2017: 46 reached 100+ customers, 9 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 2017, 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 | 2017 | 3.2 hrs | 1.12 | 2.0 hrs | 0.90 |
| Southwestern Electric Coop Inc - (IL) | 2017 | 4.6 hrs | 1.54 | 4.6 hrs | 1.54 |
| Tri-County Electric Coop, Inc (IL) | 2017 | 4.1 hrs | 1.90 | 73 min | 0.85 |
| Monroe County Elec Coop, Inc | 2017 | 2.0 hrs | 1.16 | 2.0 hrs | 1.16 |
| 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 n/a of Illinois's customers in 2017; 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, 2017, 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/2017/illinois/st-clair-county