County annual report · FIPS 19049
2020 Dallas County, IA Power Outage Report
In 2020, customers in Dallas County, IA went without power for an average of 12.5 hours, a total of 729K customer-hours (Iowa average 27.4 hours). That ranks 23rd worst of 99 Iowa counties and 640th 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 Dallas 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 15:30 | August 21, 2020 20:00 | 11d 4h | 19,149 | 695K |
| 2 | August 26, 2020 18:15 | August 27, 2020 05:45 | 11h 30m | 5,010 | 6,676 |
| 3 | January 18, 2020 15:15 | January 19, 2020 05:30 | 14h 15m | 2,586 | 3,810 |
| 4 | September 11, 2020 04:30 | September 11, 2020 06:15 | 1h 45m | 2,217 | 2,794 |
| 5 | October 5, 2020 13:15 | October 5, 2020 16:30 | 3h 15m | 1,505 | 1,151 |
| 6 | January 23, 2020 07:15 | January 23, 2020 08:45 | 1h 30m | 811 | 809 |
| 7 | December 23, 2020 16:45 | December 23, 2020 20:45 | 4h | 807 | 844 |
| 8 | July 8, 2020 21:30 | July 9, 2020 03:00 | 5h 30m | 793 | 918 |
| 9 | January 14, 2020 03:45 | January 14, 2020 05:30 | 1h 45m | 698 | 540 |
| 10 | November 5, 2020 12:15 | November 5, 2020 12:30 | 15m | 546 | 137 |
Outage episodes by size in 2020: 27 reached 100+ customers, 5 reached 1,000+ customers, 1 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 Dallas 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 |
|---|---|---|---|---|---|
| MidAmerican Energy Co | 2020 | 18.3 hrs | 1.43 | 82 min | 0.79 |
| Interstate Power and Light Co | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Midland Power Coop | - | - | - | - | - |
| Waverly Municipal Elec Utility | - | - | - | - | - |
| Guthrie County Rural E C A | - | - | - | - | - |
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 ÷ 58,451 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. Dallas County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Dallas 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/dallas-county