County annual report · FIPS 17173
2021 Shelby County, IL Power Outage Report
In 2021, customers in Shelby County, IL went without power for an average of 13.6 hours, a total of 78K customer-hours (Illinois average 2.3 hours). That ranks 1st worst of 102 Illinois counties and 614th 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 Shelby 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 | December 7, 2021 14:45 | December 14, 2021 22:15 | 7d 7h | 2,222 | 27K |
| 2 | August 12, 2021 18:45 | August 14, 2021 23:30 | 2d 4h | 2,102 | 6,115 |
| 3 | June 25, 2021 09:30 | June 25, 2021 17:45 | 8h 15m | 1,416 | 2,952 |
| 4 | November 12, 2021 14:30 | November 12, 2021 16:00 | 1h 30m | 1,167 | 1,460 |
| 5 | June 19, 2021 15:15 | June 19, 2021 22:30 | 7h 15m | 755 | 3,814 |
| 6 | July 8, 2021 01:45 | July 8, 2021 05:15 | 3h 30m | 714 | 2,230 |
| 7 | July 20, 2021 13:00 | July 20, 2021 13:15 | 15m | 712 | 178 |
| 8 | June 17, 2021 18:30 | June 18, 2021 00:45 | 6h 15m | 498 | 3,110 |
| 9 | June 16, 2021 21:15 | June 16, 2021 23:45 | 2h 30m | 497 | 871 |
| 10 | May 1, 2021 13:15 | May 1, 2021 16:30 | 3h 15m | 494 | 1,281 |
Outage episodes by size in 2021: 45 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 Shelby 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 |
| Southwestern Electric Coop Inc - (IL) | 2021 | 3.9 hrs | 2.53 | 3.8 hrs | 2.48 |
| Ameren | - | - | - | - | - |
| Norris Electric Coop | - | - | - | - | - |
| Shelby Electric Coop, Inc | - | - | - | - | - |
| Coles-Moultrie 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 ÷ 5,708 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. Shelby County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Shelby 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/shelby-county