County annual report · FIPS 19029
2025 Cass County, IA Power Outage Report
In 2025, customers in Cass County, IA went without power for an average of 1.4 hours, a total of 15K customer-hours (Iowa average 2.9 hours). That ranks 90th worst of 99 Iowa counties and 2638th 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 Cass 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 | March 19, 2025 14:15 | March 20, 2025 16:45 | 1d 2h | 1,058 | 339 |
| 2 | July 8, 2025 04:30 | July 8, 2025 13:00 | 8h 30m | 966 | 2,925 |
| 3 | July 29, 2025 19:30 | July 29, 2025 20:45 | 1h 15m | 918 | 839 |
| 4 | July 11, 2025 04:30 | July 11, 2025 10:30 | 6h | 481 | 1,199 |
| 5 | March 5, 2025 03:00 | March 5, 2025 23:00 | 20h | 379 | 2,128 |
| 6 | October 24, 2025 22:30 | October 27, 2025 01:00 | 2d 2h | 325 | 1,430 |
| 7 | August 13, 2025 14:30 | August 13, 2025 18:00 | 3h 30m | 245 | 854 |
| 8 | August 18, 2025 12:30 | August 18, 2025 19:15 | 6h 45m | 205 | 1,177 |
| 9 | August 20, 2025 13:15 | August 20, 2025 22:00 | 8h 45m | 185 | 476 |
| 10 | May 20, 2025 01:00 | May 20, 2025 15:15 | 14h 15m | 183 | 545 |
Outage episodes by size in 2025: 13 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 Cass 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 |
| Southwest Iowa Rural Elec Coop | 2018 | 2.4 hrs | 1.69 | 1.6 hrs | 1.21 |
| Farmers Electric Coop, Inc - (IA) | 2018 | 5.9 hrs | 1.44 | 2.1 hrs | 1.26 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Interstate Power and Light Co | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Waverly Municipal Elec Utility | - | - | - | - | - |
| Guthrie County Rural E C A | - | - | - | - | - |
| Nishnabotna Valley R E C | - | - | - | - | - |
| Atlantic Municipal Utilities | - | - | - | - | - |
| City of Anita - (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 ÷ 10,329 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. Cass County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Cass 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/cass-county