County annual report · FIPS 17013
2021 Calhoun County, IL Power Outage Report
In 2021, customers in Calhoun County, IL went without power for an average of 8.1 hours, a total of 15K customer-hours (Illinois average 2.3 hours). That ranks 6th worst of 102 Illinois counties and 932nd 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 Calhoun 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 | June 25, 2021 06:45 | June 25, 2021 08:00 | 1h 15m | 861 | 941 |
| 2 | January 12, 2021 00:15 | January 12, 2021 02:15 | 2h | 502 | 255 |
| 3 | July 10, 2021 04:30 | July 10, 2021 19:00 | 14h 30m | 491 | 4,282 |
| 4 | August 5, 2021 07:15 | August 5, 2021 09:15 | 2h | 461 | 922 |
| 5 | July 8, 2021 09:15 | July 8, 2021 13:45 | 4h 30m | 296 | 514 |
| 6 | July 12, 2021 17:15 | July 12, 2021 22:15 | 5h | 296 | 1,095 |
| 7 | September 3, 2021 19:30 | September 3, 2021 22:45 | 3h 15m | 283 | 301 |
| 8 | May 18, 2021 17:30 | May 18, 2021 23:15 | 5h 45m | 263 | 1,368 |
| 9 | June 26, 2021 01:15 | June 26, 2021 08:45 | 7h 30m | 217 | 1,608 |
| 10 | June 19, 2021 20:15 | June 21, 2021 02:15 | 1d 6h | 216 | 1,281 |
Outage episodes by size in 2021: 13 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 Calhoun 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 |
| Illinois Rural Electric Coop | - | - | - | - | - |
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 ÷ 1,865 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. Calhoun County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Calhoun 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/calhoun-county