County annual report · FIPS 46129
2024 Walworth County, SD Power Outage Report
In 2024, customers in Walworth County, SD went without power for an average of 0.4 hours, a total of 907 customer-hours (South Dakota average 2.3 hours). That ranks 61st worst of 65 South Dakota counties and 2870th of 2,990 nationally.
Compared with SD, the US and 2023
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Walworth County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 27, 2024 23:30 | October 28, 2024 00:00 | 30m | 305 | 153 |
| 2 | October 23, 2024 14:45 | October 23, 2024 17:30 | 2h 45m | 279 | 86 |
| 3 | July 27, 2024 11:45 | July 27, 2024 12:00 | 15m | 168 | 42 |
| 4 | July 25, 2024 09:30 | July 25, 2024 13:45 | 4h 15m | 100 | 330 |
| 5 | July 16, 2024 14:45 | July 16, 2024 15:00 | 15m | 40 | 10 |
| 6 | July 21, 2024 14:00 | July 21, 2024 15:15 | 1h 15m | 36 | 25 |
| 7 | July 19, 2024 11:45 | July 19, 2024 12:30 | 45m | 31 | 11 |
| 8 | July 14, 2024 06:15 | July 14, 2024 06:30 | 15m | 21 | 5 |
| 9 | November 22, 2024 18:00 | November 22, 2024 18:30 | 30m | 20 | 7 |
| 10 | April 29, 2024 14:30 | April 29, 2024 16:30 | 2h | 19 | 35 |
Outage episodes by size in 2024: 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 Walworth County reported on EIA Form 861 for 2024, 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 |
|---|---|---|---|---|---|
| Montana-Dakota Utilities Co | 2024 | 2.9 hrs | 1.26 | 2.1 hrs | 1.10 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| 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 n/a of South Dakota's customers in 2024; 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, 2024, 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/2024/south-dakota/walworth-county