County annual report · FIPS 19153
2018 Polk County, IA Power Outage Report
In 2018, customers in Polk County, IA went without power for an average of 1.3 hours, a total of 387K customer-hours (Iowa average 2.2 hours). That ranks 74th worst of 99 Iowa counties and 2158th 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 Polk 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 | June 30, 2018 21:15 | July 4, 2018 03:00 | 3d 5h | 19,193 | 98K |
| 2 | December 12, 2018 14:45 | December 12, 2018 17:30 | 2h 45m | 8,289 | 6,097 |
| 3 | May 29, 2018 12:30 | June 1, 2018 08:30 | 2d 20h | 8,165 | 35K |
| 4 | October 26, 2018 12:00 | October 26, 2018 23:45 | 11h 45m | 7,196 | 5,736 |
| 5 | September 18, 2018 17:15 | September 19, 2018 02:30 | 9h 15m | 4,742 | 5,195 |
| 6 | January 11, 2018 08:15 | January 11, 2018 18:15 | 10h | 4,432 | 9,324 |
| 7 | February 16, 2018 10:30 | February 16, 2018 18:00 | 7h 30m | 4,426 | 5,574 |
| 8 | August 27, 2018 09:00 | August 28, 2018 06:15 | 21h 15m | 4,043 | 5,095 |
| 9 | April 14, 2018 09:45 | April 15, 2018 03:15 | 17h 30m | 3,988 | 4,127 |
| 10 | September 15, 2018 04:00 | September 15, 2018 10:30 | 6h 30m | 3,898 | 995 |
Outage episodes by size in 2018: 140 reached 100+ customers, 61 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 Polk 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 |
| Consumers Energy Coop - (IA) | 2018 | 2.4 hrs | 1.61 | 1.6 hrs | 1.35 |
| Interstate Power and Light Co | - | - | - | - | - |
| Midland Power Coop | - | - | - | - | - |
| Waverly Municipal Elec Utility | - | - | - | - | - |
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 ÷ 287,095 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. Polk County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Polk 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/polk-county