County annual report · FIPS 17173
2023 Shelby County, IL Power Outage Report
In 2023, customers in Shelby County, IL went without power for an average of 27.0 hours, a total of 154K customer-hours (Illinois average 4.0 hours). That ranks 8th worst of 102 Illinois counties and 278th of 2,977 nationally.
Compared with IL, the US and 2022
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Shelby County, 2023
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 29, 2023 18:00 | July 4, 2023 15:00 | 4d 21h | 4,823 | 114K |
| 2 | June 13, 2023 04:15 | June 13, 2023 06:30 | 2h 15m | 4,801 | 9,038 |
| 3 | February 9, 2023 20:00 | February 9, 2023 22:15 | 2h 15m | 1,589 | 498 |
| 4 | March 3, 2023 15:30 | March 6, 2023 21:30 | 3d 6h | 1,504 | 6,090 |
| 5 | July 5, 2023 21:30 | July 6, 2023 02:00 | 4h 30m | 570 | 757 |
| 6 | February 22, 2023 21:30 | February 23, 2023 07:15 | 9h 45m | 544 | 1,651 |
| 7 | September 1, 2023 20:15 | September 1, 2023 22:15 | 2h | 544 | 552 |
| 8 | October 12, 2023 01:45 | October 12, 2023 04:15 | 2h 30m | 461 | 692 |
| 9 | October 27, 2023 13:15 | October 27, 2023 14:45 | 1h 30m | 461 | 692 |
| 10 | April 14, 2023 17:45 | April 14, 2023 18:45 | 1h | 328 | 237 |
Outage episodes by size in 2023: 29 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 2023, 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 | 2023 | 9.9 hrs | 1.33 | 1.9 hrs | 0.82 |
| Southwestern Electric Coop Inc - (IL) | 2023 | 6.2 hrs | 2.74 | 4.3 hrs | 2.22 |
| 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 n/a of Illinois's customers in 2023; 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, 2023, 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/2023/illinois/shelby-county