County annual report · FIPS 19039
2025 Clarke County, IA Power Outage Report
In 2025, customers in Clarke County, IA went without power for an average of 1.7 hours, a total of 7,113 customer-hours (Iowa average 2.9 hours). That ranks 85th worst of 99 Iowa counties and 2551st 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 Clarke 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 | June 29, 2025 01:30 | June 29, 2025 01:45 | 15m | 561 | 140 |
| 2 | July 31, 2025 04:00 | July 31, 2025 05:00 | 1h | 550 | 550 |
| 3 | July 23, 2025 11:00 | July 23, 2025 11:45 | 45m | 291 | 218 |
| 4 | September 17, 2025 22:30 | September 18, 2025 02:45 | 4h 15m | 248 | 275 |
| 5 | July 20, 2025 04:00 | July 20, 2025 18:00 | 14h | 164 | 814 |
| 6 | July 9, 2025 14:15 | July 9, 2025 17:30 | 3h 15m | 119 | 155 |
| 7 | March 5, 2025 05:45 | March 5, 2025 12:15 | 6h 30m | 115 | 435 |
| 8 | April 12, 2025 19:30 | April 12, 2025 20:30 | 1h | 111 | 83 |
| 9 | April 5, 2025 08:00 | April 5, 2025 10:30 | 2h 30m | 108 | 247 |
| 10 | August 12, 2025 15:00 | August 12, 2025 15:15 | 15m | 107 | 27 |
Outage episodes by size in 2025: 10 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 Clarke 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 |
|---|---|---|---|---|---|
| Interstate Power and Light Co | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Clarke Electric Coop Inc - (IA) | - | - | - | - | - |
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 ÷ 4,290 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. Clarke County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Clarke 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/). https://massoutage.com/reports/2025/iowa/clarke-county