County annual report · FIPS 46075
2021 Jones County, SD Power Outage Report
In 2021, customers in Jones County, SD went without power for an average of 9.2 hours, a total of 6,431 customer-hours (South Dakota average 3.4 hours). That ranks 7th worst of 61 South Dakota counties and 836th 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 Jones 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 | March 14, 2021 22:00 | March 17, 2021 12:30 | 2d 14h | 279 | 4,094 |
| 2 | July 14, 2021 11:30 | July 14, 2021 14:30 | 3h | 227 | 283 |
| 3 | December 23, 2021 16:00 | December 23, 2021 16:15 | 15m | 219 | 55 |
| 4 | April 6, 2021 17:00 | April 6, 2021 17:45 | 45m | 218 | 164 |
| 5 | March 30, 2021 01:00 | March 30, 2021 01:30 | 30m | 163 | 82 |
| 6 | March 29, 2021 18:00 | March 30, 2021 00:15 | 6h 15m | 141 | 690 |
| 7 | September 23, 2021 20:00 | September 23, 2021 21:00 | 1h | 84 | 84 |
| 8 | December 7, 2021 11:00 | December 7, 2021 13:30 | 2h 30m | 84 | 155 |
| 9 | August 25, 2021 13:15 | August 25, 2021 14:30 | 1h 15m | 57 | 71 |
| 10 | April 22, 2021 17:15 | April 22, 2021 19:15 | 2h | 51 | 101 |
Outage episodes by size in 2021: 6 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 Jones 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 |
|---|---|---|---|---|---|
| West Central Electric Coop Inc - (SD) | 2018 | 3.7 hrs | 1.25 | 1.5 hrs | 1.25 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
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 ÷ 697 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. Jones County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Jones 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/jones-county