County annual report · FIPS 55095
2021 Polk County, WI Power Outage Report
In 2021, customers in Polk County, WI went without power for an average of 1.3 hours, a total of 43K customer-hours (Wisconsin average 4.7 hours). That ranks 58th worst of 72 Wisconsin counties and 2554th 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 Polk 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 | September 25, 2021 17:45 | September 26, 2021 08:15 | 14h 30m | 2,567 | 5,172 |
| 2 | May 2, 2021 07:30 | May 2, 2021 09:15 | 1h 45m | 2,033 | 2,765 |
| 3 | May 28, 2021 13:00 | May 28, 2021 16:30 | 3h 30m | 1,976 | 684 |
| 4 | July 29, 2021 02:00 | July 29, 2021 18:45 | 16h 45m | 1,964 | 5,066 |
| 5 | August 7, 2021 17:45 | August 11, 2021 19:00 | 4d 1h | 1,449 | 2,404 |
| 6 | January 21, 2021 19:00 | January 21, 2021 19:15 | 15m | 1,445 | 361 |
| 7 | June 2, 2021 13:15 | June 2, 2021 17:15 | 4h | 1,314 | 453 |
| 8 | May 19, 2021 12:00 | May 19, 2021 15:00 | 3h | 1,313 | 2,359 |
| 9 | January 5, 2021 15:45 | January 5, 2021 18:45 | 3h | 786 | 594 |
| 10 | March 10, 2021 22:00 | March 10, 2021 23:00 | 1h | 729 | 183 |
Outage episodes by size in 2021: 35 reached 100+ customers, 8 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 Polk 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 |
|---|---|---|---|---|---|
| Northern States Power Co | 2021 | 6.7 hrs | 1.60 | 2.2 hrs | 1.10 |
| Barron Electric Coop | 2021 | 2.7 hrs | 1.32 | 2.7 hrs | 1.32 |
| Polk-Burnett Electric Coop | 2021 | 54 min | 0.70 | 43 min | 0.63 |
| St Croix Electric Coop | 2018 | 1.8 hrs | 0.69 | 1.7 hrs | 0.68 |
| Northwestern Wisconsin Elec Co | - | - | - | - | - |
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 ÷ 33,361 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. Polk County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Polk 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/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2021/wisconsin/polk-county