County annual report · FIPS 17001
2021 Adams County, IL Power Outage Report
In 2021, customers in Adams County, IL went without power for an average of 1.9 hours, a total of 61K customer-hours (Illinois average 2.3 hours). That ranks 71st worst of 102 Illinois counties and 2252nd 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 Adams 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 | April 27, 2021 12:45 | September 29, 2021 21:15 | 155d 8h | 5,567 | 27K |
| 2 | September 29, 2021 22:45 | October 21, 2021 02:15 | 21d 3h | 2,443 | 3,219 |
| 3 | January 1, 2021 09:15 | January 4, 2021 04:00 | 2d 18h | 1,866 | 13K |
| 4 | January 25, 2021 22:30 | January 26, 2021 02:45 | 4h 15m | 1,833 | 2,512 |
| 5 | October 21, 2021 05:00 | December 1, 2021 07:15 | 41d 2h | 976 | 5,250 |
| 6 | January 4, 2021 12:30 | January 5, 2021 05:15 | 16h 45m | 676 | 1,210 |
| 7 | April 7, 2021 23:45 | April 8, 2021 05:45 | 6h | 583 | 827 |
| 8 | December 1, 2021 09:00 | December 21, 2021 09:30 | 20d | 543 | 2,275 |
| 9 | March 2, 2021 18:45 | March 2, 2021 19:30 | 45m | 430 | 308 |
| 10 | April 20, 2021 14:30 | April 20, 2021 16:30 | 2h | 373 | 103 |
Outage episodes by size in 2021: 15 reached 100+ customers, 4 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 Adams 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 |
| Adams Electric Coop | 2018 | 2.2 hrs | 1.12 | 2.2 hrs | 1.12 |
| Ameren | - | - | - | - | - |
| Illinois Rural Electric Coop | - | - | - | - | - |
| Western Illinois Elec 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 98% of Illinois's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 31,760 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. Adams County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Adams 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/adams-county