massoutage

2018 Iowa Power Outage Report

In 2018, the average Iowa customer went without power for about 2.2 hours, the 34th worst of 51 states (US average 5.3 hours). Figures from DOE/ORNL EAGLE-I, including major storm days.

Avg hrs / customer
2.2
vs prior year
▲ 10%
vs 2017
Customer-hours out
3.5M
Peak customers out
22,691
across the state at once
EAGLE-I coverage
89%
of IA customers
Counties reporting
99

Iowa year over year

Iowa: average hours without power per customer by year2015: 1.1h; 2016: 1.8h; 2017: 2.0h; 2018: 2.2h, coverage 89%; 2019: 2.2h, coverage 89%; 2020: 27.3h, coverage 91%; 2021: 2.7h, coverage 91%; 2022: 1.6h, coverage 91%; 2023: 2.0h; 2024: 3.2h; 2025: 2.9h01020300%50%100%1.1h20151.8h20162.0h20172.2h20182.2h201927.3h20202.7h20211.6h20222.0h20233.2h20242.9h2025
Use the arrow keys to read values.
Average hours without power per customer. Line: EAGLE-I coverage, share of customers tracked (right axis).

Month by month, 2018

Customer-hours without power across Iowa; July was the worst.

CSVJSON
Iowa customer-hours without power by month, 2018Jan 151K, Feb 73K, Mar 261K, Apr 264K, May 298K, Jun 512K, Jul 878K, Aug 381K, Sep 243K, Oct 191K, Nov 153K, Dec 95K0250k500k750k1M151KJan73KFeb261KMar264KApr298KMay512KJun878KJul381KAug243KSep191KOct153KNov95KDec
Use the arrow keys to read values.

All 99 Iowa counties, 2018

Ranked by average hours without power per customer. Each county links to its annual report.

CSVJSON
#CountyHrs / customerCustomer-hoursCustomersPeak outEvents
1Marshall County33.8538K15,9458,657429
2Louisa County11.050K4,5541,441263
3Iowa County10.271K6,9652,935764
4Adams County9.518K1,844556191
5Worth County8.920K2,2891,352199
6Calhoun County7.933K4,0922,152130
7Mills County7.655K7,2706,702337
8Monroe County6.928K4,0561,282391
9Washington County6.866K9,7003,410343
10Lee County6.297K15,4866,316429
11Van Buren County6.219K3,1461,115162
12Jefferson County6.242K6,8792,899365
13Greene County6.121K3,4173,417175
14Hancock County5.229K5,4891,826256
15Butler County4.622K4,7911,170209
16Franklin County4.320K4,637664228
17Cerro Gordo County4.2123K29,43510,632502
18Floyd County4.132K7,8863,993255
19Wayne County4.012K2,947501147
20Allamakee County4.027K6,7501,346182
21Clinton County3.779K21,5054,540523
22Ringgold County3.68,9522,5111,522122
23Poweshiek County3.624K6,7082,983336
24Audubon County3.48,6332,511284158
25Humboldt County3.211K3,5071,919180
26Decatur County3.211K3,356733113
27Mahaska County3.125K8,1622,531388
28Winnebago County3.022K7,2132,028370
29Fremont County3.013K4,2851,095200
30Adair County2.911K3,68650640
31Shelby County2.720K7,164927234
32Union County2.718K6,6451,897237
33Tama County2.722K8,1692,099282
34Crawford County2.624K9,2131,140299
35Warren County2.560K23,8063,950475
36Appanoose County2.517K6,572851286
37Hardin County2.517K6,8851,992354
38Dickinson County2.517K6,7314,275184
39Wright County2.413K5,5382,394243
40Winneshiek County2.423K9,3692,089284
41Harrison County2.317K7,6201,093253
42Des Moines County2.342K18,2072,033462
43Montgomery County2.313K5,7241,388190
44Wapello County2.350K21,9606,921475
45Jasper County2.335K15,5661,521502
46Palo Alto County2.39,3884,1661,121168
47Keokuk County2.211K4,6841,140285
48Pottawattamie County2.2110K51,1324,953602
49Jones County2.118K8,5073,163230
50Woodbury County2.154K25,6265,264649
51Mitchell County2.113K6,3471,386169
52Carroll County2.118K8,6663,098158
53Cedar County2.119K8,9861,967330
54Pocahontas County2.06,3833,159432145
55Page County2.018K9,0351,675243
56O'Brien County2.09,9845,0301,477206
57Fayette County2.017K8,7121,312251
58Clarke County1.98,1814,2901,254190
59Johnson County1.9145K77,76912,865778
60Henry County1.822K11,9231,041484
61Ida County1.85,7063,2311,087114
62Sac County1.86,8743,8951,36099
63Kossuth County1.713K7,6981,179209
64Cherokee County1.710K5,968739146
65Osceola County1.76,0123,58825820
66Madison County1.615K9,3661,078224
67Scott County1.6109K67,6113,133935
68Boone County1.617K10,6701,818363
69Grundy County1.68,5475,5071,28885
70Plymouth County1.513K8,581713254
71Howard County1.56,0624,1771,076173
72Delaware County1.410K7,035840114
73Webster County1.429K20,4112,333396
74Polk County1.3387K287,09519,193968
75Lyon County1.36,7915,09067057
76Benton County1.317K13,498896380
77Chickasaw County1.39,0126,991642173
78Davis County1.25,8834,71823088
79Hamilton County1.111K9,2051,084156
80Taylor County1.13,2482,951525112
81Emmet County1.06,1455,93443398
82Marion County1.020K19,8763,579331
83Linn County1.0119K118,2477,7541,031
84Clayton County1.010K10,4211,941196
85Clay County0.913K13,668787120
86Black Hawk County0.953K57,53317,227751
87Buchanan County0.911K12,254758240
88Dubuque County0.838K46,5464,302444
89Sioux County0.813K16,9931,467223
90Dallas County0.744K58,4514,206618
91Buena Vista County0.77,93411,607615195
92Lucas County0.62,7204,225780164
93Muscatine County0.618K30,353650346
94Cass County0.65,83910,329856111
95Guthrie County0.63,0085,3901,86761
96Story County0.532K63,3961,909332
97Bremer County0.46,92516,028681196
98Monona County0.42,8297,38869443
99Jackson County0.22,29410,30248794

Biggest Iowa outages of 2018

Up to 25 county outage episodes with the most customers out at once.

CSVJSON
#CountyStarted (UTC)Ended (UTC)DurationPeak outCustomer-hours
1Polk County, IAJune 30, 2018 21:15July 4, 2018 03:003d 5h19,19398K
2Black Hawk County, IAMay 31, 2018 15:30June 1, 2018 01:159h 45m17,2275,935
3Johnson County, IANovember 5, 2018 21:30November 6, 2018 13:0015h 30m12,8655,641
4Johnson County, IAJune 9, 2018 11:00June 9, 2018 18:007h10,9987,962
5Cerro Gordo County, IAMay 28, 2018 22:30May 30, 2018 11:151d 12h10,63253K
6Marshall County, IAJuly 19, 2018 21:45August 7, 2018 15:3018d 17h8,657465K
7Johnson County, IAAugust 28, 2018 16:00August 30, 2018 03:301d 11h8,62514K
8Polk County, IADecember 12, 2018 14:45December 12, 2018 17:302h 45m8,2896,097
9Polk County, IAMay 29, 2018 12:30June 1, 2018 08:302d 20h8,16535K
10Linn County, IAAugust 6, 2018 08:30August 7, 2018 03:1518h 45m7,7549,991
11Polk County, IAOctober 26, 2018 12:00October 26, 2018 23:4511h 45m7,1965,736
12Wapello County, IAFebruary 11, 2018 16:15February 11, 2018 16:3015m6,9211,730
13Mills County, IAJanuary 21, 2018 17:00January 22, 2018 00:157h 15m6,70227K
14Lee County, IAJuly 20, 2018 00:15July 22, 2018 01:302d 1h6,31643K
15Wapello County, IAJune 28, 2018 18:45June 29, 2018 21:001d 2h5,50017K
16Woodbury County, IADecember 20, 2018 15:15December 20, 2018 21:156h5,2644,585
17Pottawattamie County, IAJune 14, 2018 11:30June 15, 2018 21:451d 10h4,9534,354
18Black Hawk County, IAJuly 26, 2018 01:45July 26, 2018 05:303h 45m4,8153,272
19Polk County, IASeptember 18, 2018 17:15September 19, 2018 02:309h 15m4,7425,195
20Black Hawk County, IAJuly 16, 2018 14:15July 16, 2018 15:301h 15m4,5971,178
21Clinton County, IAJuly 8, 2018 12:15July 8, 2018 19:006h 45m4,5404,885
22Polk County, IAJanuary 11, 2018 08:15January 11, 2018 18:1510h4,4329,324
23Polk County, IAFebruary 16, 2018 10:30February 16, 2018 18:007h 30m4,4265,574
24Cerro Gordo County, IAMarch 24, 2018 03:00March 25, 2018 03:451d4,39424K
25Dubuque County, IAAugust 26, 2018 17:00August 26, 2018 18:301h 30m4,3025,377
EAGLE-I tracked about 89% of Iowa's electricity customers in 2018; outages at utilities it does not see are not counted. Hours per customer divide outage customer-minutes by modeled county customers.
Iowa by year:2025202420232022202120202019201720162015
Other states in 2018:NCVAWVMARIVTMEMI

Part of the 2018 US Power Outage Report.

Data from DOE EAGLE-I, every source we read.