County annual report · FIPS 19119
2025 Lyon County, IA Power Outage Report
In 2025, customers in Lyon County, IA went without power for an average of 6.7 hours, a total of 34K customer-hours (Iowa average 2.9 hours). That ranks 18th worst of 99 Iowa counties and 1190th of 3,000 nationally.
Compared with IA, the US and 2024
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Lyon County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 29, 2025 02:30 | July 31, 2025 11:15 | 2d 8h | 1,792 | 24K |
| 2 | May 19, 2025 11:45 | May 19, 2025 19:30 | 7h 45m | 779 | 4,450 |
| 3 | June 2, 2025 22:30 | June 3, 2025 00:00 | 1h 30m | 765 | 749 |
| 4 | May 20, 2025 02:00 | May 20, 2025 04:15 | 2h 15m | 743 | 188 |
| 5 | July 31, 2025 22:45 | August 1, 2025 07:45 | 9h | 488 | 321 |
| 6 | July 28, 2025 06:00 | July 28, 2025 13:00 | 7h | 477 | 1,006 |
| 7 | February 20, 2025 18:00 | February 20, 2025 19:00 | 1h | 379 | 379 |
| 8 | July 23, 2025 13:15 | July 23, 2025 16:15 | 3h | 377 | 771 |
| 9 | August 6, 2025 17:45 | August 6, 2025 18:00 | 15m | 263 | 66 |
| 10 | August 14, 2025 18:15 | August 14, 2025 22:00 | 3h 45m | 203 | 761 |
Outage episodes by size in 2025: 11 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 Lyon County reported on EIA Form 861 for 2025, 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 |
|---|---|---|---|---|---|
| MidAmerican Energy Co | 2024 | 5.5 hrs | 1.42 | 1.7 hrs | 0.94 |
| Nobles Cooperative Electric | 2018 | 4.0 hrs | 1.09 | 4.0 hrs | 1.09 |
| Osceola Electric Coop, Inc | 2018 | 2.4 hrs | 4.21 | 2.4 hrs | 4.21 |
| Lyon Rural Electric Coop | 2018 | 34 min | 0.38 | 34 min | 0.38 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Interstate Power and Light Co | - | - | - | - | - |
| North West Rural Electric Coop | - | - | - | - | - |
| City of Larchwood - (IA) | - | - | - | - | - |
| Rock Rapids Municipal Utility | - | - | - | - | - |
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 Iowa's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 5,090 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. Lyon County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Lyon County, IA annual power outage report, 2025, 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/2025/iowa/lyon-county