Black Hawk County, Iowa Power Outages, 2015 to 2023

Black Hawk County, Iowa had 6 major outages from 2015 to 2023

Lower outage time among US counties

Residents here averaged 0.18 times the US outage time per person and 0.21 times the Iowa rate. It ranks 76 of 97 in the state, where 1 has the most. Data confidence: High, with 9 years of records.

0.7major outages per year

6 of 9years with a major outage

20 hrslongest major outage

Sep, Julhardest months

September and July made up 47% of this county's outage time. The largest outage on record began Sep 9, 2019, reached 14,037 customers, and left at least 200 customers out for 20.0 hours.

Outage time per resident, rated Iowa counties

MostLeast

Outage impact by year

Customer-hours without power. 1,000 customers out for 2 hours is 2,000 customer-hours.

50K

100K

150K

200K

2015'152016'162017'172018'182019'192020'202021'212022'222023'23

Show yearly numbers

Year	Customer-hours	Reported outages	Major outages
2015	14,222	13	0
2016	99,664	40	1
2017	88,821	36	1
2018	30,639	26	0
2019	112,218	29	1
2020	68,058	30	1
2021	38,282	27	1
2022	42,235	26	1
2023	19,165	17	0

When outages hit

Share of this county's customer-hours by month.

10%

20%

30%

40%

JanJFebFMarMAprAMayMJunJJulJAugASepSOctONovNDecD

Largest outages on record

Start date	Hours	Peak customers	Customer-hours
Sep 9, 2019	20.0	14,037	80,544
Sep 22, 2016	3.2	32,746	54,466
May 17, 2017	20.2	3,319	30,362
Mar 7, 2017	6.8	8,304	20,490
Jul 6, 2022	12.5	3,477	19,554

Hours measure how long at least 200 customers in the county were out. Most customers get power back sooner.

Size your backup battery

Start with what you would keep running. Wattages are typical averages, so check your own appliances.

Phones, Wi-Fi, lights, about 60 WRefrigerator, about 60 WChest freezer, about 40 WGas furnace fan, about 160 W

Hours to cover: 24

1,700 Whof battery capacity, allowing for about 15% conversion loss

If anyone relies on medical equipment, plan that with their provider. Run portable fuel generators outdoors only, at least 20 feet from doors, windows and vents. See the outage checklist.

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How to read this

A major outage lasted at least 8 hours and reached customers equal to at least 1% of county residents.
Records cover outages of at least 200 customers in a county. They do not show what happened on your street.
Utilities that do not report can make a county look better than it is. Data ends in 2023. Read the full method.