County annual report · FIPS 46043
2021 Douglas County, SD Power Outage Report
In 2021, customers in Douglas County, SD went without power for an average of 1.4 hours, a total of 2,379 customer-hours (South Dakota average 3.4 hours). That ranks 48th worst of 61 South Dakota counties and 2524th of 2,974 nationally.
Compared with SD, the US and 2020
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Douglas County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | February 16, 2021 15:00 | February 16, 2021 17:15 | 2h 15m | 634 | 1,427 |
| 2 | January 10, 2021 15:30 | January 10, 2021 16:30 | 1h | 511 | 511 |
| 3 | August 29, 2021 18:00 | August 29, 2021 19:15 | 1h 15m | 265 | 199 |
| 4 | June 11, 2021 11:15 | June 11, 2021 13:15 | 2h | 122 | 183 |
| 5 | July 21, 2021 17:30 | July 21, 2021 19:45 | 2h 15m | 13 | 24 |
| 6 | January 10, 2021 23:45 | January 11, 2021 00:45 | 1h | 5 | 5 |
| 7 | March 19, 2021 14:45 | March 19, 2021 16:15 | 1h 30m | 5 | 8 |
| 8 | July 10, 2021 00:45 | July 10, 2021 03:00 | 2h 15m | 2 | 4 |
| 9 | November 4, 2021 17:45 | November 4, 2021 21:45 | 4h | 2 | 8 |
| 10 | July 5, 2021 12:45 | July 5, 2021 16:00 | 3h 15m | 1 | 3 |
Outage episodes by size in 2021: 4 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 Douglas County reported on EIA Form 861 for 2021, 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) | 2021 | 1.5 hrs | 0.95 | 81 min | 0.83 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Southeastern Electric Coop Inc - (SD) | - | - | - | - | - |
| Douglas Electric Coop, Inc | - | - | - | - | - |
| Charles Mix Electric Assn, 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 79% of South Dakota's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 1,745 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. Douglas County has data for 2020–2025.
Cite this report
MassOutage (massoutage.com), Douglas County, SD annual power outage report, 2021, 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/2021/south-dakota/douglas-county