County annual report · FIPS 46127
2022 Union County, SD Power Outage Report
In 2022, customers in Union County, SD went without power for an average of 3.5 hours, a total of 12K customer-hours (South Dakota average 6.9 hours). That ranks 36th worst of 63 South Dakota counties and 1781st 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 Union 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 | July 23, 2022 15:00 | July 23, 2022 18:15 | 3h 15m | 2,144 | 3,024 |
| 2 | June 14, 2022 19:15 | June 14, 2022 22:15 | 3h | 886 | 666 |
| 3 | May 11, 2022 21:00 | May 12, 2022 12:45 | 15h 45m | 513 | 795 |
| 4 | April 19, 2022 01:30 | April 19, 2022 03:45 | 2h 15m | 497 | 381 |
| 5 | May 12, 2022 21:30 | May 13, 2022 11:00 | 13h 30m | 240 | 842 |
| 6 | March 30, 2022 03:30 | March 30, 2022 05:15 | 1h 45m | 225 | 394 |
| 7 | July 5, 2022 21:45 | July 6, 2022 01:45 | 4h | 157 | 85 |
| 8 | April 22, 2022 14:45 | April 23, 2022 20:15 | 1d 5h | 137 | 307 |
| 9 | May 30, 2022 19:00 | May 31, 2022 12:30 | 17h 30m | 125 | 1,015 |
| 10 | February 5, 2022 18:00 | February 5, 2022 18:45 | 45m | 100 | 75 |
Outage episodes by size in 2022: 10 reached 100+ customers, 1 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 Union 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 |
|---|---|---|---|---|---|
| MidAmerican Energy Co | 2022 | 1.8 hrs | 1.03 | 87 min | 0.88 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Southeastern Electric Coop Inc - (SD) | - | - | - | - | - |
| Clay-Union Electric Corp | - | - | - | - | - |
| City of Beresford | - | - | - | - | - |
| City of Elk Point | - | - | - | - | - |
| Union County Electric Coop Inc | - | - | - | - | - |
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 ÷ 3,359 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. Union County has data for 2015–2017, 2019–2025.
Cite this report
MassOutage (massoutage.com), Union 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/union-county