County annual report · FIPS 46129
2019 Walworth County, SD Power Outage Report
In 2019, customers in Walworth County, SD went without power for an average of 1.9 hours, a total of 4,499 customer-hours (South Dakota average 3.8 hours). That ranks 24th worst of 58 South Dakota counties and 2085th of 2,945 nationally.
Compared with SD, the US and 2018
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Walworth County, 2019
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 17, 2019 06:15 | October 17, 2019 08:00 | 1h 45m | 1,040 | 1,604 |
| 2 | April 25, 2019 19:15 | April 25, 2019 20:00 | 45m | 633 | 474 |
| 3 | July 17, 2019 03:45 | July 17, 2019 04:00 | 15m | 469 | 117 |
| 4 | July 17, 2019 06:45 | July 17, 2019 08:00 | 1h 15m | 442 | 548 |
| 5 | September 12, 2019 02:30 | September 12, 2019 02:45 | 15m | 335 | 84 |
| 6 | September 13, 2019 07:00 | September 13, 2019 08:15 | 1h 15m | 216 | 270 |
| 7 | September 28, 2019 20:15 | September 28, 2019 21:15 | 1h | 208 | 205 |
| 8 | August 7, 2019 00:45 | August 7, 2019 08:45 | 8h | 115 | 849 |
| 9 | June 6, 2019 15:00 | June 6, 2019 17:30 | 2h 30m | 84 | 200 |
| 10 | July 19, 2019 11:15 | July 19, 2019 13:15 | 2h | 27 | 45 |
Outage episodes by size in 2019: 8 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 2019, 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 87% of South Dakota's customers in 2019; 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, 2019, 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/2019/south-dakota/walworth-county