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2018 Iowa Power Outage Report

In 2018, the average Iowa customer went without power for about 2.2 hours — the 34th worst of any US state that year, below the state's decade average. Figures from DOE/ORNL EAGLE-I.

Avg hrs / customer
2.2
Peak customers out
19,193
Rank (worst state)
34th
Counties affected
20

Iowa outages over the decade

Average hours without power per customer, 2018 highlighted.

1.1h20151.8h20162.0h20172.2h20182.2h201927.4h20202.7h20211.6h20222.0h20233.2h20242.9h2025

Hardest-hit Iowa counties in 2018

By peak customers out during the year's worst event.

1Polk County19,1932Black Hawk County17,2273Johnson County12,8654Cerro Gordo County10,6325Marshall County8,6576Linn County7,7547Wapello County6,9218Mills County6,7029Lee County6,31610Woodbury County5,26411Pottawattamie County4,95312Clinton County4,54013Dubuque County4,30214Dickinson County4,27515Dallas County4,20616Floyd County3,99317Warren County3,95018Greene County3,68919Marion County3,57920Washington County3,410

Biggest Iowa outages of 2018

CountyBeganPeak customers out
Polk CountyJune 30, 201819,193
Black Hawk CountyMay 31, 201817,227
Johnson CountyNovember 5, 201812,865
Johnson CountyJune 9, 201810,998
Cerro Gordo CountyMay 28, 201810,632
Marshall CountyJuly 19, 20188,657
Johnson CountyAugust 28, 20188,625
Polk CountyDecember 12, 20188,289
Polk CountyMay 29, 20188,165
Linn CountyAugust 6, 20187,754
Iowa by year:20252024202320222021202020192017
Other states in 2018:NCVAWVMARIVT

Part of the 2018 US Power Outage Report. Source: DOE/ORNL EAGLE-I. “Avg hours per customer” is a SAIDI-like measure (outage customer-minutes ÷ tracked customers); coverage varies by year.