County annual report · FIPS 27133
2021 Rock County, MN Power Outage Report
In 2021, customers in Rock County, MN went without power for an average of 2.3 hours, a total of 12K customer-hours (Minnesota average 2.1 hours). That ranks 25th worst of 79 Minnesota counties and 2092nd of 2,974 nationally.
Compared with MN, the US and 2020
Coverage line is EAGLE-I's share of Minnesota customers tracked each year.
Biggest outages in Rock 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 | October 13, 2021 09:45 | October 13, 2021 14:00 | 4h 15m | 777 | 1,717 |
| 2 | June 8, 2021 13:15 | June 8, 2021 17:00 | 3h 45m | 453 | 1,699 |
| 3 | August 28, 2021 22:30 | August 29, 2021 00:30 | 2h | 319 | 401 |
| 4 | January 2, 2021 22:30 | January 3, 2021 00:30 | 2h | 152 | 186 |
| 5 | August 29, 2021 01:30 | September 22, 2021 19:15 | 24d 17h | 106 | 942 |
| 6 | January 4, 2021 15:15 | January 4, 2021 16:00 | 45m | 99 | 63 |
| 7 | July 28, 2021 13:00 | August 5, 2021 16:00 | 8d 3h | 85 | 4,050 |
| 8 | January 11, 2021 14:45 | January 11, 2021 21:45 | 7h | 81 | 188 |
| 9 | March 9, 2021 15:15 | March 9, 2021 19:45 | 4h 30m | 62 | 189 |
| 10 | March 3, 2021 15:15 | March 3, 2021 18:45 | 3h 30m | 60 | 170 |
Outage episodes by size in 2021: 5 reached 100+ customers, 0 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 Rock 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 - Minnesota | 2021 | 1.8 hrs | 0.82 | 77 min | 0.74 |
| Sioux Valley SW Elec Coop | 2021 | 1.8 hrs | 1.08 | 1.5 hrs | 0.93 |
| Nobles Cooperative Electric | 2018 | 4.0 hrs | 1.09 | 4.0 hrs | 1.09 |
| City of Luverne - (MN) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 80% of Minnesota's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 4,958 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. Rock County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Rock County, MN 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/minnesota/rock-county