County annual report · FIPS 19171
2023 Tama County, IA Power Outage Report
In 2023, customers in Tama County, IA went without power for an average of 2.6 hours, a total of 21K customer-hours (Iowa average 2.0 hours). That ranks 34th worst of 99 Iowa counties and 2093rd of 2,977 nationally.
Compared with IA, the US and 2022
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Tama County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 9, 2023 00:30 | October 9, 2023 01:15 | 45m | 799 | 502 |
| 2 | October 28, 2023 06:15 | October 29, 2023 20:15 | 1d 14h | 772 | 3,412 |
| 3 | May 30, 2023 15:45 | June 1, 2023 19:45 | 2d 4h | 660 | 884 |
| 4 | December 12, 2023 20:30 | December 19, 2023 15:15 | 6d 18h | 329 | 1,256 |
| 5 | May 22, 2023 07:15 | May 22, 2023 10:45 | 3h 30m | 328 | 1,148 |
| 6 | July 29, 2023 00:15 | August 1, 2023 13:15 | 3d 13h | 280 | 324 |
| 7 | March 1, 2023 08:00 | March 1, 2023 09:45 | 1h 45m | 244 | 427 |
| 8 | May 29, 2023 12:30 | May 29, 2023 14:30 | 2h | 240 | 480 |
| 9 | February 22, 2023 23:15 | February 23, 2023 21:00 | 21h 45m | 207 | 1,523 |
| 10 | November 21, 2023 03:30 | November 21, 2023 05:45 | 2h 15m | 170 | 214 |
Outage episodes by size in 2023: 14 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 Tama County reported on EIA Form 861 for 2023, 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 | 2023 | 52 min | 0.65 | 52 min | 0.65 |
| T I P Rural Electric Coop | 2018 | 2.5 hrs | 1.33 | 2.5 hrs | 1.33 |
| Consumers Energy Coop - (IA) | 2023 | 1.9 hrs | 0.92 | 1.9 hrs | 0.92 |
| 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 2023; 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, 2023, 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/2023/iowa/tama-county