County annual report · FIPS 19171
2020 Tama County, IA Power Outage Report
In 2020, customers in Tama County, IA went without power for an average of 110.0 hours, a total of 899K customer-hours (Iowa average 27.4 hours). That ranks 5th worst of 99 Iowa counties and 58th of 3,019 nationally.
Compared with IA, the US and 2019
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Tama County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | August 10, 2020 16:30 | August 24, 2020 23:30 | 14d 7h | 6,848 | 882K |
| 2 | January 26, 2020 04:30 | January 26, 2020 15:00 | 10h 30m | 1,458 | 1,280 |
| 3 | September 6, 2020 09:45 | September 7, 2020 02:30 | 16h 45m | 766 | 3,344 |
| 4 | August 8, 2020 20:15 | August 8, 2020 21:45 | 1h 30m | 634 | 511 |
| 5 | January 17, 2020 19:15 | January 17, 2020 21:45 | 2h 30m | 600 | 832 |
| 6 | July 30, 2020 07:30 | July 30, 2020 08:30 | 1h | 407 | 407 |
| 7 | December 23, 2020 17:00 | December 23, 2020 21:15 | 4h 15m | 349 | 346 |
| 8 | November 16, 2020 20:45 | November 17, 2020 21:45 | 1d 1h | 254 | 2,841 |
| 9 | September 17, 2020 18:00 | September 17, 2020 19:15 | 1h 15m | 182 | 137 |
| 10 | October 9, 2020 16:00 | October 30, 2020 17:00 | 21d 1h | 179 | 1,106 |
Outage episodes by size in 2020: 14 reached 100+ customers, 2 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 2020, 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 | 2020 | 14.1 hrs | 1.01 | 54 min | 0.59 |
| T I P Rural Electric Coop | 2018 | 2.5 hrs | 1.33 | 2.5 hrs | 1.33 |
| Consumers Energy Coop - (IA) | 2020 | 35.0 hrs | 2.79 | 69 min | 1.26 |
| 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 91% of Iowa's customers in 2020; 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, 2020, 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/2020/iowa/tama-county