County annual report · FIPS 46003
2023 Aurora County, SD Power Outage Report
In 2023, customers in Aurora County, SD went without power for an average of 3.3 hours, a total of 4,569 customer-hours (South Dakota average 2.3 hours). That ranks 19th worst of 61 South Dakota counties and 1852nd of 2,977 nationally.
Compared with SD, the US and 2022
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Aurora County, 2023
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 26, 2023 03:30 | July 26, 2023 14:15 | 10h 45m | 511 | 2,309 |
| 2 | May 11, 2023 10:15 | May 11, 2023 13:30 | 3h 15m | 509 | 1,376 |
| 3 | July 13, 2023 16:00 | July 13, 2023 22:15 | 6h 15m | 223 | 178 |
| 4 | October 3, 2023 14:00 | October 3, 2023 14:30 | 30m | 30 | 8 |
| 5 | March 7, 2023 02:00 | March 7, 2023 03:15 | 1h 15m | 28 | 29 |
| 6 | September 25, 2023 00:30 | September 25, 2023 13:30 | 13h | 22 | 281 |
| 7 | January 21, 2023 11:15 | January 21, 2023 13:45 | 2h 30m | 20 | 50 |
| 8 | February 15, 2023 08:30 | February 15, 2023 12:45 | 4h 15m | 17 | 69 |
| 9 | March 1, 2023 06:30 | March 1, 2023 12:15 | 5h 45m | 10 | 42 |
| 10 | July 18, 2023 14:45 | July 18, 2023 19:30 | 4h 45m | 6 | 29 |
Outage episodes by size in 2023: 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 2023, 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) | 2023 | 1.9 hrs | 1.37 | 74 min | 1.03 |
| 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 n/a of South Dakota's customers in 2023; 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, 2023, 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/2023/south-dakota/aurora-county