Jefferson County, Missouri Power Outages, 2015 to 2023

Jefferson County, Missouri had 14 major outages from 2015 to 2023

Below middle outage time among US counties

Residents here averaged 0.43 times the US outage time per person and 0.83 times the Missouri rate. It ranks 53 of 108 in the state, where 1 has the most. Data confidence: High, with 9 years of records.

1.6major outages per year

7 of 9years with a major outage

71 hrslongest major outage

Jul, Aughardest months

July and August made up 53% of this county's outage time. The largest outage on record began Jul 13, 2016, reached 19,529 customers, and left at least 200 customers out for 54.5 hours.

Outage time per resident, rated Missouri counties

MostLeast

Outage impact by year

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

200K

400K

600K

800K

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

Show yearly numbers

Year	Customer-hours	Reported outages	Major outages
2015	133,387	72	0
2016	547,004	79	2
2017	71,863	31	1
2018	0	0	0
2019	21,113	8	1
2020	340,250	77	1
2021	231,337	90	2
2022	165,165	102	2
2023	681,577	88	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
Jul 13, 2016	54.5	19,529	374,567
Aug 10, 2020	49.2	18,913	259,480
Apr 15, 2023	28.0	12,784	174,482
Jun 30, 2023	71.0	5,749	123,699
Aug 12, 2021	38.5	11,138	117,513

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.