County annual report · FIPS 19049
2018 Dallas County, IA Power Outage Report
In 2018, customers in Dallas County, IA went without power for an average of 0.7 hours, a total of 44K customer-hours (Iowa average 2.2 hours). That ranks 90th worst of 99 Iowa counties and 2414th of 2,798 nationally.
Compared with IA, the US and 2017
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Dallas County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | April 14, 2018 02:00 | April 14, 2018 09:45 | 7h 45m | 4,206 | 5,483 |
| 2 | August 13, 2018 14:00 | August 13, 2018 15:15 | 1h 15m | 1,607 | 1,606 |
| 3 | June 30, 2018 21:15 | July 1, 2018 15:15 | 18h | 1,590 | 5,272 |
| 4 | July 19, 2018 15:45 | July 19, 2018 21:45 | 6h | 1,578 | 1,228 |
| 5 | January 11, 2018 12:45 | January 11, 2018 20:15 | 7h 30m | 1,016 | 2,752 |
| 6 | December 18, 2018 15:00 | December 18, 2018 22:15 | 7h 15m | 996 | 290 |
| 7 | July 4, 2018 18:15 | July 4, 2018 22:00 | 3h 45m | 934 | 2,104 |
| 8 | August 21, 2018 12:30 | August 21, 2018 14:00 | 1h 30m | 783 | 642 |
| 9 | April 13, 2018 23:15 | April 14, 2018 00:45 | 1h 30m | 748 | 648 |
| 10 | March 2, 2018 20:00 | March 3, 2018 00:30 | 4h 30m | 598 | 158 |
Outage episodes by size in 2018: 42 reached 100+ customers, 5 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 Dallas County reported on EIA Form 861 for 2018, 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 | 2018 | 1.9 hrs | 1.18 | 75 min | 0.96 |
| 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 89% of Iowa's customers in 2018; 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, 2018, 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/2018/iowa/dallas-county