County annual report · FIPS 17167
2025 Sangamon County, IL Power Outage Report
In 2025, customers in Sangamon County, IL went without power for an average of 1.5 hours, a total of 203K customer-hours (Illinois average 2.5 hours). That ranks 85th worst of 102 Illinois counties and 2625th 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 Sangamon 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 | August 1, 2025 14:45 | August 5, 2025 18:15 | 4d 3h | 5,205 | 8,595 |
| 2 | May 15, 2025 18:00 | May 17, 2025 21:30 | 2d 3h | 4,076 | 13K |
| 3 | March 4, 2025 14:15 | March 4, 2025 19:30 | 5h 15m | 3,522 | 6,934 |
| 4 | November 30, 2025 00:15 | November 30, 2025 22:15 | 22h | 3,083 | 21K |
| 5 | September 20, 2025 17:45 | September 23, 2025 10:15 | 2d 16h | 3,078 | 14K |
| 6 | June 18, 2025 16:00 | June 19, 2025 12:45 | 20h 45m | 2,252 | 5,005 |
| 7 | August 18, 2025 18:30 | September 10, 2025 01:15 | 22d 6h | 2,049 | 6,369 |
| 8 | July 8, 2025 19:30 | July 9, 2025 16:15 | 20h 45m | 1,532 | 5,043 |
| 9 | June 13, 2025 15:00 | June 13, 2025 19:15 | 4h 15m | 1,451 | 2,600 |
| 10 | April 28, 2025 13:15 | April 29, 2025 10:45 | 21h 30m | 1,439 | 755 |
Outage episodes by size in 2025: 98 reached 100+ customers, 17 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 Sangamon 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 |
| Menard Electric Coop | 2024 | 2.8 hrs | 1.49 | 1.9 hrs | 1.27 |
| Rural Electric Conven Coop | 2018 | 4.0 hrs | 1.91 | 2.0 hrs | 1.84 |
| Ameren | - | - | - | - | - |
| Shelby Electric Coop, Inc | - | - | - | - | - |
| City of Springfield - (IL) | - | - | - | - | - |
| Village of Chatham - (IL) | - | - | - | - | - |
| Village of Riverton - (IL) | - | - | - | - | - |
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 ÷ 138,475 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. Sangamon County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Sangamon 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/sangamon-county