County annual report · FIPS 17009
2021 Brown County, IL Power Outage Report
In 2021, customers in Brown County, IL went without power for an average of 2.3 hours, a total of 7,032 customer-hours (Illinois average 2.3 hours). That ranks 58th worst of 102 Illinois counties and 2096th 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 Brown 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 25, 2021 22:30 | January 26, 2021 00:30 | 2h | 1,425 | 661 |
| 2 | January 1, 2021 16:45 | January 1, 2021 21:15 | 4h 30m | 1,239 | 1,117 |
| 3 | January 1, 2021 22:15 | January 2, 2021 03:15 | 5h | 790 | 238 |
| 4 | May 13, 2021 14:45 | May 13, 2021 16:30 | 1h 45m | 407 | 109 |
| 5 | January 2, 2021 04:45 | January 2, 2021 05:45 | 1h | 378 | 96 |
| 6 | July 10, 2021 02:30 | July 10, 2021 17:45 | 15h 15m | 279 | 4,234 |
| 7 | April 13, 2021 17:30 | April 13, 2021 18:45 | 1h 15m | 80 | 76 |
| 8 | September 3, 2021 17:30 | September 4, 2021 00:00 | 6h 30m | 40 | 153 |
| 9 | March 17, 2021 15:45 | March 17, 2021 18:15 | 2h 30m | 30 | 57 |
| 10 | March 18, 2021 14:15 | March 18, 2021 20:00 | 5h 45m | 14 | 33 |
Outage episodes by size in 2021: 6 reached 100+ customers, 2 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 Brown 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 | - | - | - | - | - |
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 ÷ 3,007 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. Brown County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Brown 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/brown-county