County annual report · FIPS 19171
2024 Tama County, IA Power Outage Report
In 2024, customers in Tama County, IA went without power for an average of 7.0 hours, a total of 57K customer-hours (Iowa average 3.2 hours). That ranks 14th worst of 99 Iowa counties and 1257th of 2,990 nationally.
Compared with IA, the US and 2023
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Tama 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 | May 21, 2024 10:30 | May 24, 2024 00:15 | 2d 13h | 4,503 | 15K |
| 2 | October 30, 2024 20:30 | October 31, 2024 01:45 | 5h 15m | 1,184 | 769 |
| 3 | April 17, 2024 22:30 | April 18, 2024 02:30 | 4h | 1,177 | 4,708 |
| 4 | August 22, 2024 19:30 | August 22, 2024 19:45 | 15m | 821 | 205 |
| 5 | February 22, 2024 16:30 | March 5, 2024 16:30 | 12d | 697 | 2,052 |
| 6 | March 12, 2024 15:00 | March 28, 2024 14:45 | 15d 23h | 547 | 5,918 |
| 7 | May 17, 2024 04:15 | May 17, 2024 11:30 | 7h 15m | 430 | 2,581 |
| 8 | November 18, 2024 06:30 | November 18, 2024 19:45 | 13h 15m | 342 | 307 |
| 9 | July 2, 2024 21:15 | July 3, 2024 00:30 | 3h 15m | 282 | 77 |
| 10 | August 28, 2024 13:30 | August 28, 2024 17:30 | 4h | 282 | 74 |
Outage episodes by size in 2024: 24 reached 100+ customers, 3 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 Tama 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 |
|---|---|---|---|---|---|
| East-Central Iowa Rural Elec Coop | 2024 | 38 min | 0.53 | 38 min | 0.53 |
| T I P Rural Electric Coop | 2018 | 2.5 hrs | 1.33 | 2.5 hrs | 1.33 |
| Consumers Energy Coop - (IA) | 2024 | 8.2 hrs | 1.54 | 1.6 hrs | 1.00 |
| Interstate Power and Light Co | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Grundy County Rural Elec Coop | - | - | - | - | - |
| City of Traer - (IA) | - | - | - | - | - |
| City of Dysart - (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 2024; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 8,169 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. Tama County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Tama County, IA 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/iowa/tama-county