County annual report · FIPS 55049
2021 Iowa County, WI Power Outage Report
In 2021, customers in Iowa County, WI went without power for an average of 3.8 hours, a total of 35K customer-hours (Wisconsin average 4.7 hours). That ranks 27th worst of 72 Wisconsin counties and 1587th of 2,974 nationally.
Compared with WI, the US and 2020
Coverage line is EAGLE-I's share of Wisconsin customers tracked each year.
Biggest outages in Iowa 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 | December 16, 2021 02:45 | December 20, 2021 15:00 | 4d 12h | 3,809 | 22K |
| 2 | August 8, 2021 11:15 | August 8, 2021 12:15 | 1h | 1,119 | 1,119 |
| 3 | November 27, 2021 17:30 | November 27, 2021 18:45 | 1h 15m | 694 | 830 |
| 4 | July 5, 2021 08:00 | July 5, 2021 10:45 | 2h 45m | 536 | 1,467 |
| 5 | November 21, 2021 20:30 | November 21, 2021 23:15 | 2h 45m | 493 | 486 |
| 6 | April 22, 2021 21:45 | April 22, 2021 23:30 | 1h 45m | 257 | 258 |
| 7 | August 10, 2021 21:45 | August 11, 2021 07:30 | 9h 45m | 220 | 543 |
| 8 | August 7, 2021 22:45 | August 8, 2021 08:00 | 9h 15m | 200 | 596 |
| 9 | March 3, 2021 16:45 | March 3, 2021 17:00 | 15m | 199 | 50 |
| 10 | June 4, 2021 21:15 | June 4, 2021 22:45 | 1h 30m | 173 | 140 |
Outage episodes by size in 2021: 15 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 Iowa 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 |
|---|---|---|---|---|---|
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Wisconsin Power & Light Co | - | - | - | - | - |
| Scenic Rivers Energy Coop | - | - | - | - | - |
| Village of Muscoda - (WI) | - | - | - | - | - |
| Village of Black Earth - (WI) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 85% of Wisconsin's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 9,067 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. Iowa County has data for 2015–2017, 2020–2025.
Cite this report
MassOutage (massoutage.com), Iowa County, WI 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/). https://massoutage.com/reports/2021/wisconsin/iowa-county