County annual report · FIPS 46129
2020 Walworth County, SD Power Outage Report
In 2020, customers in Walworth County, SD went without power for an average of 0.6 hours, a total of 1,456 customer-hours (South Dakota average 4.6 hours). That ranks 53rd worst of 62 South Dakota counties and 2793rd of 3,019 nationally.
Compared with SD, the US and 2019
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Walworth County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 19, 2020 16:45 | June 19, 2020 17:00 | 15m | 1,025 | 256 |
| 2 | July 31, 2020 23:15 | August 1, 2020 00:30 | 1h 15m | 249 | 186 |
| 3 | September 3, 2020 02:00 | September 3, 2020 02:15 | 15m | 171 | 43 |
| 4 | June 7, 2020 23:30 | June 8, 2020 13:45 | 14h 15m | 112 | 724 |
| 5 | December 13, 2020 18:00 | December 13, 2020 19:45 | 1h 45m | 51 | 89 |
| 6 | August 3, 2020 18:15 | August 3, 2020 20:00 | 1h 45m | 26 | 29 |
| 7 | July 22, 2020 15:45 | July 22, 2020 16:15 | 30m | 20 | 10 |
| 8 | June 16, 2020 21:15 | June 16, 2020 23:30 | 2h 15m | 15 | 18 |
| 9 | August 7, 2020 14:45 | August 7, 2020 15:15 | 30m | 15 | 8 |
| 10 | July 11, 2020 02:15 | July 11, 2020 02:30 | 15m | 14 | 4 |
Outage episodes by size in 2020: 4 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 Walworth County reported on EIA Form 861 for 2020, 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 2020; 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, 2020, 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/2020/south-dakota/walworth-county