St. Clair County, Michigan Power Outages, 2015 to 2023

St. Clair County, Michigan had 51 major outages from 2015 to 2023

Higher outage time among US counties

Residents here averaged 2.12 times the US outage time per person and 0.94 times the Michigan rate. It ranks 39 of 81 in the state, where 1 has the most. Data confidence: High, with 9 years of records.

5.7major outages per year

9 of 9years with a major outage

108 hrslongest major outage

Sep, Julhardest months

September and July made up 40% of this county's outage time. The largest outage on record began Sep 22, 2021, reached 30,637 customers, and left at least 200 customers out for 107.8 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.

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

Show yearly numbers

Year	Customer-hours	Reported outages	Major outages
2015	624,671	190	7
2016	211,670	23	2
2017	289,849	67	2
2018	890,404	118	3
2019	800,773	150	8
2020	629,310	122	7
2021	2,548,218	121	12
2022	368,098	94	5
2023	1,114,669	64	5

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 22, 2021	107.8	30,637	1,350,023
May 4, 2018	53.5	25,132	697,711
Mar 4, 2023	97.0	13,776	442,369
Jul 20, 2023	75.0	12,778	409,184
Jul 20, 2019	49.0	9,968	353,104

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.