County annual report · FIPS 17173
2025 Shelby County, IL Power Outage Report
In 2025, customers in Shelby County, IL went without power for an average of 10.3 hours, a total of 59K customer-hours (Illinois average 2.5 hours). That ranks 13th worst of 102 Illinois counties and 774th of 3,000 nationally.
Compared with IL, the US and 2024
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Shelby County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 8, 2025 23:30 | May 9, 2025 02:45 | 3h 15m | 1,620 | 2,388 |
| 2 | March 19, 2025 21:00 | March 20, 2025 03:45 | 6h 45m | 1,473 | 1,605 |
| 3 | March 15, 2025 04:45 | March 15, 2025 18:45 | 14h | 1,380 | 8,538 |
| 4 | February 16, 2025 09:00 | February 16, 2025 19:30 | 10h 30m | 1,281 | 10K |
| 5 | March 30, 2025 18:00 | March 30, 2025 21:15 | 3h 15m | 1,279 | 1,146 |
| 6 | June 11, 2025 14:15 | June 11, 2025 15:15 | 1h | 1,234 | 1,234 |
| 7 | March 5, 2025 04:30 | March 5, 2025 12:00 | 7h 30m | 1,223 | 2,290 |
| 8 | March 23, 2025 13:45 | March 23, 2025 16:15 | 2h 30m | 1,172 | 1,217 |
| 9 | May 16, 2025 21:00 | May 17, 2025 22:15 | 1d 1h | 946 | 1,188 |
| 10 | February 23, 2025 17:00 | February 23, 2025 19:45 | 2h 45m | 772 | 1,657 |
Outage episodes by size in 2025: 47 reached 100+ customers, 8 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 2025, 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 | 2024 | 3.7 hrs | 1.13 | 2.0 hrs | 0.91 |
| Southwestern Electric Coop Inc - (IL) | 2024 | 5.1 hrs | 2.21 | 4.4 hrs | 1.78 |
| 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 2025; 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, 2025, 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/2025/illinois/shelby-county