County annual report · FIPS 46129
2022 Walworth County, SD Power Outage Report
In 2022, customers in Walworth County, SD went without power for an average of 2.6 hours, a total of 6,215 customer-hours (South Dakota average 6.9 hours). That ranks 41st worst of 63 South Dakota counties and 2070th of 2,976 nationally.
Compared with SD, the US and 2021
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Walworth County, 2022
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 28, 2022 03:45 | September 28, 2022 04:30 | 45m | 2,021 | 1,405 |
| 2 | October 4, 2022 03:00 | October 4, 2022 03:30 | 30m | 1,598 | 695 |
| 3 | June 1, 2022 05:30 | June 1, 2022 07:00 | 1h 30m | 658 | 984 |
| 4 | October 1, 2022 04:00 | October 1, 2022 04:30 | 30m | 594 | 297 |
| 5 | May 14, 2022 03:15 | May 14, 2022 04:00 | 45m | 461 | 346 |
| 6 | June 3, 2022 02:30 | June 3, 2022 05:15 | 2h 45m | 221 | 607 |
| 7 | October 4, 2022 04:15 | October 4, 2022 05:15 | 1h | 124 | 121 |
| 8 | October 1, 2022 05:15 | October 1, 2022 09:15 | 4h | 73 | 270 |
| 9 | April 23, 2022 05:00 | April 23, 2022 07:15 | 2h 15m | 60 | 118 |
| 10 | April 14, 2022 09:30 | April 14, 2022 10:45 | 1h 15m | 23 | 29 |
Outage episodes by size in 2022: 7 reached 100+ customers, 2 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 Walworth County reported on EIA Form 861 for 2022, 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 89% of South Dakota's customers in 2022; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 2,370 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. Walworth County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Walworth County, SD annual power outage report, 2022, 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/2022/south-dakota/walworth-county