County annual report · FIPS 17167
2021 Sangamon County, IL Power Outage Report
In 2021, customers in Sangamon County, IL went without power for an average of 1.7 hours, a total of 237K customer-hours (Illinois average 2.3 hours). That ranks 77th worst of 102 Illinois counties and 2357th of 2,974 nationally.
Compared with IL, the US and 2020
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Sangamon County, 2021
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 12, 2021 14:30 | August 14, 2021 02:00 | 1d 11h | 12,454 | 55K |
| 2 | June 6, 2021 11:15 | June 6, 2021 16:45 | 5h 30m | 4,049 | 3,027 |
| 3 | December 27, 2021 01:30 | December 27, 2021 07:30 | 6h | 3,024 | 5,199 |
| 4 | May 14, 2021 13:45 | May 14, 2021 17:00 | 3h 15m | 2,971 | 1,818 |
| 5 | May 30, 2021 00:45 | May 30, 2021 04:30 | 3h 45m | 2,711 | 2,985 |
| 6 | May 7, 2021 13:00 | May 7, 2021 19:00 | 6h | 2,198 | 2,884 |
| 7 | January 3, 2021 04:30 | January 4, 2021 15:45 | 1d 11h | 2,195 | 8,952 |
| 8 | June 26, 2021 20:15 | June 28, 2021 20:15 | 2d | 2,086 | 9,995 |
| 9 | June 19, 2021 01:45 | June 23, 2021 15:45 | 4d 14h | 2,071 | 9,338 |
| 10 | July 17, 2021 20:15 | July 17, 2021 21:15 | 1h | 2,045 | 535 |
Outage episodes by size in 2021: 122 reached 100+ customers, 27 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 2021, 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 | 2021 | 3.2 hrs | 1.11 | 2.0 hrs | 0.88 |
| Menard Electric Coop | 2021 | 7.8 hrs | 2.83 | 2.8 hrs | 1.73 |
| 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 98% of Illinois's customers in 2021; 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, 2021, 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/2021/illinois/sangamon-county