County annual report · FIPS 17163
2016 St. Clair County, IL Power Outage Report
In 2016, customers in St. Clair County, IL went without power for an average of 14.1 hours, a total of 1.3M customer-hours (Illinois average 1.5 hours). That ranks 1st worst of 100 Illinois counties and 233rd of 2,391 nationally.
Compared with IL, the US and 2015
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in St. Clair County, 2016
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 1, 2016 02:30 | July 26, 2016 18:30 | 25d 16h | 40,861 | 1.1M |
| 2 | June 3, 2016 11:15 | June 4, 2016 02:15 | 15h | 8,043 | 4,244 |
| 3 | February 24, 2016 00:30 | March 2, 2016 00:15 | 6d 23h | 7,977 | 39K |
| 4 | November 2, 2016 23:00 | November 3, 2016 21:00 | 22h | 5,298 | 8,699 |
| 5 | June 24, 2016 12:00 | June 29, 2016 01:15 | 4d 13h | 4,173 | 16K |
| 6 | June 13, 2016 11:00 | June 15, 2016 02:00 | 1d 15h | 3,490 | 28K |
| 7 | May 7, 2016 17:30 | May 9, 2016 22:30 | 2d 5h | 3,097 | 23K |
| 8 | May 19, 2016 13:15 | May 19, 2016 22:00 | 8h 45m | 2,907 | 1,529 |
| 9 | May 29, 2016 22:45 | May 30, 2016 06:30 | 7h 45m | 2,681 | 1,289 |
| 10 | January 27, 2016 02:45 | January 27, 2016 13:30 | 10h 45m | 2,676 | 12K |
Outage episodes by size in 2016: 75 reached 100+ customers, 24 reached 1,000+ customers, 1 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 2016, 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 | 2016 | 4.0 hrs | 1.36 | 2.1 hrs | 1.04 |
| Southwestern Electric Coop Inc - (IL) | 2016 | 6.4 hrs | 1.72 | 84 min | 0.86 |
| Tri-County Electric Coop, Inc (IL) | 2016 | 5.8 hrs | 2.39 | 87 min | 1.00 |
| Monroe County Elec Coop, Inc | 2016 | 11.8 hrs | 0.04 | 11.8 hrs | 0.04 |
| 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 2016; 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, 2016, 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/2016/illinois/st-clair-county