County annual report · FIPS 17187
2025 Warren County, IL Power Outage Report
In 2025, customers in Warren County, IL went without power for an average of 3.5 hours, a total of 29K customer-hours (Illinois average 2.5 hours). That ranks 52nd worst of 102 Illinois counties and 1903rd 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 Warren 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 | July 23, 2025 07:30 | July 23, 2025 09:15 | 1h 45m | 1,890 | 3,308 |
| 2 | October 21, 2025 14:45 | October 22, 2025 03:30 | 12h 45m | 707 | 774 |
| 3 | June 18, 2025 02:00 | June 18, 2025 15:15 | 13h 15m | 672 | 2,014 |
| 4 | July 26, 2025 12:45 | July 26, 2025 17:45 | 5h | 634 | 1,755 |
| 5 | February 23, 2025 01:30 | February 23, 2025 06:30 | 5h | 564 | 1,935 |
| 6 | March 4, 2025 03:15 | March 4, 2025 04:30 | 1h 15m | 564 | 553 |
| 7 | September 28, 2025 16:15 | September 28, 2025 21:45 | 5h 30m | 497 | 1,821 |
| 8 | December 22, 2025 15:15 | December 26, 2025 15:00 | 3d 23h | 402 | 958 |
| 9 | November 7, 2025 03:15 | November 7, 2025 04:15 | 1h | 400 | 400 |
| 10 | November 26, 2025 10:00 | November 27, 2025 03:15 | 17h 15m | 372 | 731 |
Outage episodes by size in 2025: 21 reached 100+ customers, 1 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 Warren 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 |
| Ameren | - | - | - | - | - |
| McDonough Power 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 ÷ 8,244 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. Warren County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Warren 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/warren-county