County annual report · FIPS 17065
2025 Hamilton County, IL Power Outage Report
In 2025, customers in Hamilton County, IL went without power for an average of 7.0 hours, a total of 32K customer-hours (Illinois average 2.5 hours). That ranks 26th worst of 102 Illinois counties and 1151st 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 Hamilton 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 | January 5, 2025 22:30 | January 12, 2025 00:30 | 6d 2h | 486 | 23K |
| 2 | September 16, 2025 12:45 | September 16, 2025 19:00 | 6h 15m | 479 | 526 |
| 3 | April 29, 2025 20:00 | April 30, 2025 21:30 | 1d 1h | 474 | 1,611 |
| 4 | April 5, 2025 22:15 | April 6, 2025 01:45 | 3h 30m | 456 | 1,474 |
| 5 | July 19, 2025 18:30 | July 19, 2025 20:30 | 2h | 318 | 314 |
| 6 | June 5, 2025 05:45 | June 5, 2025 08:45 | 3h | 317 | 640 |
| 7 | July 31, 2025 19:45 | July 31, 2025 22:15 | 2h 30m | 282 | 630 |
| 8 | June 18, 2025 18:30 | June 18, 2025 19:45 | 1h 15m | 276 | 345 |
| 9 | April 16, 2025 14:15 | April 16, 2025 14:45 | 30m | 173 | 87 |
| 10 | May 20, 2025 05:45 | May 20, 2025 07:00 | 1h 15m | 170 | 170 |
Outage episodes by size in 2025: 16 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 Hamilton 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 |
|---|---|---|---|---|---|
| Southeastern IL Elec Coop, Inc | 2024 | 10.0 hrs | 3.07 | 2.3 hrs | 1.50 |
| Tri-County Electric Coop, Inc (IL) | 2024 | 6.2 hrs | 2.50 | 64 min | 0.73 |
| Wayne-White Counties Elec Coop | - | - | - | - | - |
| City of McLeansboro - (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 ÷ 4,619 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. Hamilton County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Hamilton 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/hamilton-county