Sumter County, South Carolina Power Outages, 2015 to 2023

Sumter County, South Carolina had 20 major outages from 2015 to 2023

Above middle outage time among US counties

Residents here averaged 1.24 times the US outage time per person and 1.31 times the South Carolina rate. It ranks 18 of 46 in the state, where 1 has the most. Data confidence: High, with 9 years of records.

2.2major outages per year

8 of 9years with a major outage

120 hrslongest major outage

Oct, Sephardest months

October and September made up 68% of this county's outage time. The largest outage on record began Oct 8, 2016, reached 26,512 customers, and left at least 200 customers out for 119.8 hours.

Outage time per resident, rated South Carolina counties

MostLeast

Outage impact by year

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

0.5M

1.5M

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

Show yearly numbers

Year	Customer-hours	Reported outages	Major outages
2015	81,333	49	1
2016	1,692,546	58	5
2017	96,386	66	2
2018	300,822	89	3
2019	134,194	61	2
2020	87,781	68	1
2021	184,670	79	0
2022	182,905	77	5
2023	95,496	63	1

When outages hit

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

20%

40%

60%

80%

JanJFebFMarMAprAMayMJunJJulJAugASepSOctONovNDecD

Largest outages on record

Start date	Hours	Peak customers	Customer-hours
Oct 8, 2016	119.8	26,512	1,411,045
Oct 11, 2018	33.2	10,397	109,694
Oct 8, 2016	11.8	27,446	106,576
Sep 2, 2016	47.0	6,506	80,784
Sep 15, 2018	30.2	3,964	59,091

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.

Look up another county

Counties ranked nearby

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.