Washtenaw County, Michigan Power Outages, 2015 to 2023

Washtenaw County, Michigan had 60 major outages from 2015 to 2023

Higher outage time among US counties

Residents here averaged 3.02 times the US outage time per person and 1.34 times the Michigan rate. It ranks 20 of 81 in the state, where 1 has the most. Data confidence: High, with 9 years of records.

6.7major outages per year

9 of 9years with a major outage

198 hrslongest major outage

Aug, Febhardest months

August and February made up 53% of this county's outage time. The largest outage on record began Feb 22, 2023, reached 79,028 customers, and left at least 200 customers out for 198.5 hours.

Outage time per resident, rated Michigan counties

MostLeast

Outage impact by year

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

10M

15M

20M

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

Show yearly numbers

Year	Customer-hours	Reported outages	Major outages
2015	779,151	251	5
2016	183,132	21	2
2017	578,995	144	3
2018	1,878,630	311	14
2019	2,516,312	294	9
2020	1,236,554	243	6
2021	5,662,194	229	8
2022	998,657	180	6
2023	11,007,094	169	7

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
Feb 22, 2023	198.5	79,028	5,981,714
Aug 12, 2021	127.5	68,416	4,090,582
Jul 26, 2023	103.0	34,976	1,538,051
Mar 3, 2023	119.0	39,558	1,362,468
Aug 24, 2023	130.0	34,455	1,325,639

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.