County annual report · FIPS 17083
2021 Jersey County, IL Power Outage Report
In 2021, customers in Jersey County, IL went without power for an average of 2.6 hours, a total of 20K customer-hours (Illinois average 2.3 hours). That ranks 54th worst of 102 Illinois counties and 1989th 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 Jersey 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 | January 14, 2021 21:15 | January 15, 2021 18:15 | 21h | 4,578 | 3,405 |
| 2 | April 12, 2021 13:45 | April 12, 2021 16:30 | 2h 45m | 585 | 530 |
| 3 | October 7, 2021 02:45 | October 7, 2021 05:15 | 2h 30m | 436 | 827 |
| 4 | March 10, 2021 01:15 | March 10, 2021 01:30 | 15m | 345 | 86 |
| 5 | July 10, 2021 00:15 | July 11, 2021 05:30 | 1d 5h | 316 | 3,246 |
| 6 | February 3, 2021 20:00 | February 3, 2021 23:00 | 3h | 292 | 876 |
| 7 | April 10, 2021 18:15 | April 11, 2021 05:30 | 11h 15m | 291 | 839 |
| 8 | January 23, 2021 08:00 | January 25, 2021 17:15 | 2d 9h | 218 | 1,332 |
| 9 | July 25, 2021 14:00 | July 25, 2021 17:15 | 3h 15m | 200 | 646 |
| 10 | September 19, 2021 16:15 | September 20, 2021 00:30 | 8h 15m | 195 | 757 |
Outage episodes by size in 2021: 16 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 Jersey 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 |
| Ameren | - | - | - | - | - |
| Illinois Rural Electric Coop | - | - | - | - | - |
| M J M Electric Cooperative Inc | - | - | - | - | - |
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 ÷ 7,718 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. Jersey County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Jersey 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/jersey-county