County annual report · FIPS 19123
2015 Mahaska County, IA Power Outage Report
In 2015, customers in Mahaska County, IA went without power for an average of 0.7 hours, a total of 5,742 customer-hours (Iowa average 1.1 hours). That ranks 64th worst of 99 Iowa counties and 1951st of 2,484 nationally.
Compared with IA, the US
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Mahaska County, 2015
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 7, 2015 20:15 | May 7, 2015 22:30 | 2h 15m | 499 | 377 |
| 2 | November 11, 2015 22:00 | November 12, 2015 23:00 | 1d 1h | 468 | 2,057 |
| 3 | October 16, 2015 15:00 | October 16, 2015 18:45 | 3h 45m | 202 | 642 |
| 4 | October 20, 2015 21:45 | October 20, 2015 23:15 | 1h 30m | 134 | 184 |
| 5 | November 21, 2015 02:00 | November 21, 2015 05:30 | 3h 30m | 114 | 281 |
| 6 | December 13, 2015 10:30 | December 13, 2015 14:45 | 4h 15m | 103 | 238 |
| 7 | July 24, 2015 18:00 | July 24, 2015 20:00 | 2h | 86 | 82 |
| 8 | October 24, 2015 20:30 | October 25, 2015 02:30 | 6h | 79 | 161 |
| 9 | August 24, 2015 14:45 | August 24, 2015 16:15 | 1h 30m | 63 | 94 |
| 10 | October 24, 2015 12:15 | October 24, 2015 15:30 | 3h 15m | 59 | 116 |
Outage episodes by size in 2015: 6 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 Mahaska County reported on EIA Form 861 for 2015, 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 | 2015 | 2.2 hrs | 1.05 | 87 min | 0.88 |
| T I P Rural Electric Coop | 2015 | 2.1 hrs | 1.93 | 2.1 hrs | 1.93 |
| Interstate Power and Light Co | - | - | - | - | - |
| Pella Cooperative Elec Assn | - | - | - | - | - |
| City of Pella - (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 2015; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 8,162 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. Mahaska County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Mahaska County, IA annual power outage report, 2015, 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/2015/iowa/mahaska-county