County annual report · FIPS 17065
2021 Hamilton County, IL Power Outage Report
In 2021, customers in Hamilton County, IL went without power for an average of 1.3 hours, a total of 5,993 customer-hours (Illinois average 2.3 hours). That ranks 89th worst of 102 Illinois counties and 2551st 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 Hamilton 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 2, 2021 21:00 | April 3, 2021 15:00 | 18h | 355 | 2,098 |
| 2 | July 20, 2021 21:00 | July 20, 2021 23:30 | 2h 30m | 275 | 409 |
| 3 | January 1, 2021 10:15 | January 1, 2021 11:15 | 1h | 230 | 230 |
| 4 | December 27, 2021 22:45 | December 27, 2021 23:15 | 30m | 205 | 103 |
| 5 | September 19, 2021 06:15 | September 19, 2021 07:15 | 1h | 187 | 113 |
| 6 | July 10, 2021 23:15 | July 11, 2021 04:45 | 5h 30m | 174 | 447 |
| 7 | November 30, 2021 19:15 | November 30, 2021 22:15 | 3h | 134 | 69 |
| 8 | July 16, 2021 18:15 | July 16, 2021 19:30 | 1h 15m | 132 | 165 |
| 9 | August 2, 2021 21:15 | August 2, 2021 22:30 | 1h 15m | 128 | 160 |
| 10 | August 5, 2021 17:00 | August 5, 2021 17:30 | 30m | 108 | 54 |
Outage episodes by size in 2021: 10 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 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 |
|---|---|---|---|---|---|
| Southeastern IL Elec Coop, Inc | 2021 | 2.2 hrs | 1.32 | 2.0 hrs | 1.25 |
| Tri-County Electric Coop, Inc (IL) | 2021 | 3.5 hrs | 1.86 | 63 min | 1.09 |
| 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 98% of Illinois's customers in 2021; 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, 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/hamilton-county