Milwaukee County, Wisconsin Power Outages, 2015 to 2023

Milwaukee County, Wisconsin had 25 major outages from 2015 to 2023

Below middle outage time among US counties

Residents here averaged 0.56 times the US outage time per person and 1.02 times the Wisconsin rate. It ranks 27 of 70 in the state, where 1 has the most. Data confidence: High, with 9 years of records.

2.8major outages per year

9 of 9years with a major outage

82 hrslongest major outage

Aug, Junhardest months

August and June made up 42% of this county's outage time. The largest outage on record began Aug 11, 2021, reached 61,126 customers, and left at least 200 customers out for 81.8 hours.

Outage time per resident, rated Wisconsin counties

MostLeast

Outage impact by year

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

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

Show yearly numbers

Year	Customer-hours	Reported outages	Major outages
2015	477,946	125	2
2016	662,724	170	3
2017	751,164	184	2
2018	671,236	180	2
2019	790,445	216	1
2020	875,988	211	2
2021	3,384,247	236	6
2022	1,541,460	224	4
2023	2,282,320	193	3

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
Aug 11, 2021	81.8	61,126	1,783,136
Mar 10, 2023	47.0	89,708	1,105,663
Jun 13, 2022	33.0	33,487	486,965
Jul 29, 2023	61.8	24,016	401,201
Aug 11, 2021	6.2	60,994	337,085

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.