County annual report · FIPS 17145
2021 Perry County, IL Power Outage Report
In 2021, customers in Perry County, IL went without power for an average of 4.6 hours, a total of 55K customer-hours (Illinois average 2.3 hours). That ranks 25th worst of 102 Illinois counties and 1425th 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 Perry 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 | August 12, 2021 22:30 | August 16, 2021 22:15 | 3d 23h | 2,568 | 30K |
| 2 | February 16, 2021 13:15 | February 16, 2021 19:30 | 6h 15m | 1,391 | 2,810 |
| 3 | March 17, 2021 16:30 | March 17, 2021 20:15 | 3h 45m | 1,381 | 460 |
| 4 | November 1, 2021 03:30 | November 1, 2021 04:15 | 45m | 1,264 | 623 |
| 5 | December 10, 2021 16:45 | December 10, 2021 20:00 | 3h 15m | 732 | 2,327 |
| 6 | June 5, 2021 23:30 | June 6, 2021 02:15 | 2h 45m | 699 | 1,494 |
| 7 | October 31, 2021 09:30 | October 31, 2021 11:00 | 1h 30m | 691 | 901 |
| 8 | September 28, 2021 20:00 | September 28, 2021 21:45 | 1h 45m | 648 | 488 |
| 9 | October 1, 2021 06:30 | October 1, 2021 09:30 | 3h | 503 | 1,509 |
| 10 | August 19, 2021 20:30 | August 19, 2021 22:30 | 2h | 468 | 469 |
Outage episodes by size in 2021: 27 reached 100+ customers, 4 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 Perry 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 |
| Tri-County Electric Coop, Inc (IL) | 2021 | 3.5 hrs | 1.86 | 63 min | 1.09 |
| Ameren | - | - | - | - | - |
| Egyptian Electric Coop Assn | - | - | - | - | - |
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 ÷ 11,975 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. Perry County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Perry 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/perry-county