County annual report · FIPS 17023
2025 Clark County, IL Power Outage Report
In 2025, customers in Clark County, IL went without power for an average of 5.2 hours, a total of 40K customer-hours (Illinois average 2.5 hours). That ranks 36th worst of 102 Illinois counties and 1453rd of 3,000 nationally.
Compared with IL, the US and 2024
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Clark County, 2025
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 18, 2025 18:15 | June 20, 2025 03:45 | 1d 9h | 2,658 | 16K |
| 2 | April 3, 2025 00:00 | April 3, 2025 23:00 | 23h | 1,521 | 8,530 |
| 3 | March 30, 2025 19:00 | March 31, 2025 03:15 | 8h 15m | 696 | 1,241 |
| 4 | April 19, 2025 08:45 | April 19, 2025 18:00 | 9h 15m | 416 | 1,456 |
| 5 | March 19, 2025 22:15 | March 20, 2025 20:30 | 22h 15m | 406 | 3,165 |
| 6 | July 25, 2025 21:45 | July 26, 2025 02:00 | 4h 15m | 352 | 706 |
| 7 | January 18, 2025 07:15 | January 18, 2025 08:45 | 1h 30m | 351 | 497 |
| 8 | July 28, 2025 13:00 | July 28, 2025 13:15 | 15m | 351 | 88 |
| 9 | November 4, 2025 15:30 | November 4, 2025 20:30 | 5h | 262 | 447 |
| 10 | November 26, 2025 15:15 | November 26, 2025 21:15 | 6h | 202 | 507 |
Outage episodes by size in 2025: 17 reached 100+ customers, 2 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 Clark County reported on EIA Form 861 for 2025, 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 |
| Ameren | - | - | - | - | - |
| Norris Electric Coop | - | - | - | - | - |
| Coles-Moultrie Electric Coop | - | - | - | - | - |
| Enerstar Power Corp | - | - | - | - | - |
| City of Casey - (IL) | - | - | - | - | - |
| City of Marshall - (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 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 7,829 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. Clark County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Clark County, IL annual power outage report, 2025, 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/2025/illinois/clark-county