County annual report · FIPS 17027
2021 Clinton County, IL Power Outage Report
In 2021, customers in Clinton County, IL went without power for an average of 1.7 hours, a total of 21K customer-hours (Illinois average 2.3 hours). That ranks 78th worst of 102 Illinois counties and 2361st of 2,974 nationally.
Compared with IL, the US and 2020
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Clinton County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | April 13, 2021 09:15 | April 13, 2021 17:45 | 8h 30m | 503 | 431 |
| 2 | October 25, 2021 02:00 | October 26, 2021 04:30 | 1d 2h | 456 | 2,502 |
| 3 | June 29, 2021 20:45 | June 30, 2021 01:45 | 5h | 358 | 186 |
| 4 | February 7, 2021 04:45 | February 7, 2021 11:00 | 6h 15m | 307 | 273 |
| 5 | April 1, 2021 21:30 | April 1, 2021 22:15 | 45m | 267 | 200 |
| 6 | March 31, 2021 20:15 | March 31, 2021 23:45 | 3h 30m | 263 | 363 |
| 7 | August 27, 2021 03:15 | August 27, 2021 12:30 | 9h 15m | 247 | 2,264 |
| 8 | July 30, 2021 02:45 | July 30, 2021 21:45 | 19h | 238 | 730 |
| 9 | December 11, 2021 05:15 | December 11, 2021 17:45 | 12h 30m | 218 | 411 |
| 10 | August 10, 2021 19:45 | August 11, 2021 13:45 | 18h | 171 | 276 |
Outage episodes by size in 2021: 29 reached 100+ customers, 0 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 Clinton County reported on EIA Form 861 for 2021, 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 | 2021 | 3.2 hrs | 1.11 | 2.0 hrs | 0.88 |
| Southwestern Electric Coop Inc - (IL) | 2021 | 3.9 hrs | 2.53 | 3.8 hrs | 2.48 |
| Tri-County Electric Coop, Inc (IL) | 2021 | 3.5 hrs | 1.86 | 63 min | 1.09 |
| Ameren | - | - | - | - | - |
| Clinton County Elec Coop, Inc | - | - | - | - | - |
| City of Highland | - | - | - | - | - |
| City of Breese - (IL) | - | - | - | - | - |
| City of Carlyle - (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 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 12,465 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. Clinton County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Clinton County, IL annual power outage report, 2021, 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/2021/illinois/clinton-county