County annual report · FIPS 46023
2023 Charles Mix County, SD Power Outage Report
In 2023, customers in Charles Mix County, SD went without power for an average of 2.3 hours, a total of 11K customer-hours (South Dakota average 2.3 hours). That ranks 28th worst of 61 South Dakota counties and 2174th 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 Charles Mix 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 | April 1, 2023 06:00 | April 1, 2023 13:45 | 7h 45m | 1,004 | 4,107 |
| 2 | February 15, 2023 08:00 | February 15, 2023 11:00 | 3h | 777 | 1,837 |
| 3 | June 17, 2023 00:00 | June 17, 2023 01:45 | 1h 45m | 743 | 1,070 |
| 4 | July 12, 2023 09:30 | July 12, 2023 14:45 | 5h 15m | 474 | 1,830 |
| 5 | June 24, 2023 21:00 | June 24, 2023 23:30 | 2h 30m | 344 | 860 |
| 6 | October 18, 2023 15:30 | October 18, 2023 16:45 | 1h 15m | 143 | 179 |
| 7 | April 20, 2023 16:30 | April 20, 2023 23:15 | 6h 45m | 40 | 173 |
| 8 | August 9, 2023 13:15 | August 9, 2023 18:30 | 5h 15m | 29 | 152 |
| 9 | August 13, 2023 03:00 | August 13, 2023 10:15 | 7h 15m | 26 | 105 |
| 10 | April 18, 2023 17:45 | April 18, 2023 21:15 | 3h 30m | 23 | 77 |
Outage episodes by size in 2023: 6 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 Charles Mix 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 | - | - | - | - | - |
| Douglas Electric Coop, Inc | - | - | - | - | - |
| Charles Mix Electric Assn, Inc | - | - | - | - | - |
| Town of Pickstown - (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 ÷ 4,915 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. Charles Mix County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Charles Mix 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/charles-mix-county