County annual report · FIPS 46003
2022 Aurora County, SD Power Outage Report
In 2022, customers in Aurora County, SD went without power for an average of 5.1 hours, a total of 6,931 customer-hours (South Dakota average 6.9 hours). That ranks 28th worst of 63 South Dakota counties and 1401st 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 Aurora 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 | May 12, 2022 21:15 | May 13, 2022 09:30 | 12h 15m | 524 | 4,456 |
| 2 | August 16, 2022 10:15 | August 16, 2022 13:00 | 2h 45m | 284 | 710 |
| 3 | May 30, 2022 06:00 | May 30, 2022 08:45 | 2h 45m | 221 | 608 |
| 4 | June 27, 2022 16:00 | June 27, 2022 22:15 | 6h 15m | 54 | 156 |
| 5 | June 23, 2022 17:00 | June 23, 2022 20:45 | 3h 45m | 23 | 50 |
| 6 | May 17, 2022 01:15 | May 17, 2022 02:30 | 1h 15m | 22 | 14 |
| 7 | January 25, 2022 19:15 | January 25, 2022 21:15 | 2h | 21 | 42 |
| 8 | December 13, 2022 21:15 | December 13, 2022 23:45 | 2h 30m | 21 | 40 |
| 9 | May 10, 2022 18:00 | May 10, 2022 22:30 | 4h 30m | 18 | 45 |
| 10 | July 19, 2022 12:45 | July 19, 2022 19:45 | 7h | 15 | 89 |
Outage episodes by size in 2022: 3 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 Aurora 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 |
|---|---|---|---|---|---|
| NorthWestern Energy - (SD) | 2022 | 2.1 hrs | 1.26 | 80 min | 1.01 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Central Electric Coop, Inc - (SD) | - | - | - | - | - |
| Douglas Electric Coop, Inc | - | - | - | - | - |
| City of Plankinton - (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 ÷ 1,368 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. Aurora County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Aurora 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/aurora-county