County annual report · FIPS 17167
2023 Sangamon County, IL Power Outage Report
In 2023, customers in Sangamon County, IL went without power for an average of 19.7 hours, a total of 2.7M customer-hours (Illinois average 4.0 hours). That ranks 15th worst of 102 Illinois counties and 409th 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 Sangamon 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 17:15 | July 11, 2023 10:00 | 11d 16h | 48,681 | 2.6M |
| 2 | March 3, 2023 15:45 | March 21, 2023 14:45 | 17d 23h | 4,947 | 43K |
| 3 | September 26, 2023 18:15 | September 26, 2023 19:30 | 1h 15m | 3,826 | 1,175 |
| 4 | June 10, 2023 14:45 | June 10, 2023 21:00 | 6h 15m | 2,293 | 2,274 |
| 5 | March 31, 2023 23:00 | April 2, 2023 18:45 | 1d 19h | 2,059 | 10K |
| 6 | June 11, 2023 14:45 | June 12, 2023 02:30 | 11h 45m | 2,054 | 1,009 |
| 7 | December 1, 2023 11:45 | December 1, 2023 17:00 | 5h 15m | 1,674 | 5,058 |
| 8 | November 1, 2023 15:00 | November 22, 2023 17:45 | 21d 2h | 1,585 | 11K |
| 9 | February 27, 2023 12:30 | February 28, 2023 06:45 | 18h 15m | 1,523 | 3,575 |
| 10 | September 26, 2023 05:30 | September 26, 2023 09:00 | 3h 30m | 1,509 | 1,888 |
Outage episodes by size in 2023: 84 reached 100+ customers, 21 reached 1,000+ customers, 1 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 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 |
| Menard Electric Coop | 2023 | 7.4 hrs | 2.47 | 1.6 hrs | 1.46 |
| 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 2023; 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, 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/sangamon-county