County annual report · FIPS 46107
2021 Potter County, SD Power Outage Report
In 2021, customers in Potter County, SD went without power for an average of 2.6 hours, a total of 2,954 customer-hours (South Dakota average 3.4 hours). That ranks 32nd worst of 61 South Dakota counties and 2002nd 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 Potter 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 3, 2021 22:15 | February 3, 2021 23:15 | 1h | 1,027 | 345 |
| 2 | October 14, 2021 05:45 | October 14, 2021 06:30 | 45m | 347 | 259 |
| 3 | February 4, 2021 00:00 | February 4, 2021 04:30 | 4h 30m | 345 | 1,548 |
| 4 | August 20, 2021 09:30 | August 20, 2021 11:15 | 1h 45m | 287 | 209 |
| 5 | March 30, 2021 02:15 | March 30, 2021 10:00 | 7h 45m | 233 | 418 |
| 6 | September 10, 2021 02:30 | September 10, 2021 04:30 | 2h | 56 | 112 |
| 7 | November 25, 2021 09:45 | November 25, 2021 14:45 | 5h | 8 | 40 |
| 8 | May 20, 2021 18:00 | May 20, 2021 19:45 | 1h 45m | 6 | 11 |
| 9 | August 26, 2021 12:15 | August 26, 2021 14:15 | 2h | 6 | 12 |
| 10 | June 11, 2021 07:30 | June 11, 2021 07:45 | 15m | 5 | 1 |
Outage episodes by size in 2021: 5 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 Potter 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 |
|---|---|---|---|---|---|
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Montana-Dakota Utilities Co | - | - | - | - | - |
| Cam Wal Electric Coop, 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 ÷ 1,138 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. Potter County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Potter 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/). https://massoutage.com/reports/2021/south-dakota/potter-county