County annual report · FIPS 46037
2022 Day County, SD Power Outage Report
In 2022, customers in Day County, SD went without power for an average of 11.5 hours, a total of 47K customer-hours (South Dakota average 6.9 hours). That ranks 20th worst of 63 South Dakota counties and 620th of 2,976 nationally.
Compared with SD, the US and 2021
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Day County, 2022
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | April 7, 2022 03:00 | April 7, 2022 06:15 | 3h 15m | 2,407 | 3,529 |
| 2 | December 14, 2022 08:15 | December 15, 2022 21:15 | 1d 13h | 2,317 | 6,018 |
| 3 | December 13, 2022 16:30 | December 14, 2022 07:00 | 14h 30m | 1,821 | 6,357 |
| 4 | May 9, 2022 12:15 | May 9, 2022 13:45 | 1h 30m | 1,157 | 559 |
| 5 | July 4, 2022 11:45 | July 5, 2022 12:45 | 1d 1h | 993 | 11K |
| 6 | August 6, 2022 01:15 | August 6, 2022 08:15 | 7h | 948 | 1,936 |
| 7 | July 23, 2022 12:45 | July 23, 2022 20:00 | 7h 15m | 752 | 801 |
| 8 | May 10, 2022 09:45 | May 10, 2022 10:15 | 30m | 571 | 286 |
| 9 | May 13, 2022 00:00 | May 13, 2022 04:15 | 4h 15m | 408 | 409 |
| 10 | April 7, 2022 19:15 | April 8, 2022 00:00 | 4h 45m | 378 | 1,189 |
Outage episodes by size in 2022: 21 reached 100+ customers, 4 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 Day County reported on EIA Form 861 for 2022, 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 |
|---|---|---|---|---|---|
| Otter Tail Power Co | 2022 | 6.2 hrs | 2.20 | 2.1 hrs | 1.80 |
| NorthWestern Energy - (SD) | 2022 | 2.1 hrs | 1.26 | 80 min | 1.01 |
| Northern Electric Coop, Inc | 2022 | 5.1 hrs | 1.09 | 1.8 hrs | 0.77 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Montana-Dakota Utilities Co | - | - | - | - | - |
| Codington-Clark Elec Coop, Inc | - | - | - | - | - |
| Lake Region Electric Assn, Inc - (SD) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 89% of South Dakota's customers in 2022; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 4,051 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. Day County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Day County, SD annual power outage report, 2022, 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/2022/south-dakota/day-county