County annual report · FIPS 46079
2024 Lake County, SD Power Outage Report
In 2024, customers in Lake County, SD went without power for an average of 1.0 hours, a total of 7,955 customer-hours (South Dakota average 2.3 hours). That ranks 50th worst of 65 South Dakota counties and 2733rd 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 Lake 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 29, 2024 13:45 | October 29, 2024 22:15 | 8h 30m | 562 | 205 |
| 2 | April 30, 2024 19:00 | April 30, 2024 19:15 | 15m | 471 | 118 |
| 3 | May 27, 2024 14:45 | May 27, 2024 16:00 | 1h 15m | 289 | 361 |
| 4 | January 24, 2024 23:30 | January 25, 2024 02:45 | 3h 15m | 200 | 505 |
| 5 | December 26, 2024 09:00 | December 26, 2024 09:15 | 15m | 190 | 48 |
| 6 | May 21, 2024 14:15 | May 21, 2024 16:00 | 1h 45m | 189 | 143 |
| 7 | December 26, 2024 10:15 | December 27, 2024 17:00 | 1d 6h | 151 | 3,135 |
| 8 | June 9, 2024 13:00 | June 9, 2024 14:45 | 1h 45m | 102 | 173 |
| 9 | May 2, 2024 13:15 | May 2, 2024 14:15 | 1h | 82 | 82 |
| 10 | November 19, 2024 10:15 | November 19, 2024 11:30 | 1h 15m | 77 | 91 |
Outage episodes by size in 2024: 8 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 Lake 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 |
|---|---|---|---|---|---|
| Otter Tail Power Co | 2024 | 2.6 hrs | 1.37 | 1.9 hrs | 1.09 |
| Northern States Power Co - Minnesota | 2024 | 2.6 hrs | 0.99 | 76 min | 0.80 |
| Sioux Valley SW Elec Coop | 2024 | 46 min | 0.92 | 46 min | 0.92 |
| Southeastern Electric Coop Inc - (SD) | - | - | - | - | - |
| City of Madison - (SD) | - | - | - | - | - |
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 ÷ 8,064 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. Lake County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Lake 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/lake-county