Power Out Map
– 0% of Colleton out 0 customers out in South Carolina

Power outage history

Colleton County South Carolina

14hours

without power for the average customer in a typical year, 2018–2025

14th most of 46 in South Carolina 2.2× the national median

Worst outage on record Hurricane Helene · Sep 27, 2024 100% of customers out · 90% back in 3.5 days
Hours without power, average customer per year 14h / yr State average 9.6 h · national median 6.6 h
Major outages a year 4.4 Peaks over 10% of customers or 50,000 customers
Typical time to restore 90% 3hours Median across major outages, from the peak
Longest single outage 5.8days Hurricane Matthew, over 1% of customers out
Outage hours on storm days 85% Share falling on days with a NOAA storm report here
Worst year 2024 2.2 days without power, average customer
Electricity customers 20,355 ORNL customer model · 8 well-covered years

Every day since 2015

Eleven years, one night at a time

Each cell is a day. The brighter it is, the larger the share of Colleton's customers who were without power at that day's worst moment.

20152016201720182019202020212022202320242025
0%100% of customers out

Year by year

Hours in the dark, per customer

2024 was the worst well-recorded year, at 2.2 days for the average customer. Hatched years have a thin record and are left out of the averages.

Colleton, hours without power per customer

ColletonUS median countySouth Carolina average
0 20 40 60 80 1.3 ’15 47 ’16 14 ’17 7.7 ’18 15 ’19 12 ’20 5.6 ’21 8.8 ’22 6.0 ’23 54 ’24 5.1 ’25 SC 9.6 US 6.6

The record

The biggest outages since 2015

Ranked by customer-hours lost: customers out multiplied by how long they stayed out. Times are local.

Began Storm Peak out Share Lasted 90% restored Customer-hours
Sep 27, 2024 Hurricane Helene 20,355 100% 5.8 d 3.5 d 855k
Oct 8, 2016 Hurricane Matthew 11,286 55% 5.8 d 4.8 d 808k
Sep 11, 2017 Hurricane Irma 11,277 55% 2.6 d 32 h 204k
Sep 5, 2019 Hurricane Dorian 7,506 37% 2.6 d 37 h 198k
Apr 13, 2020 Tornadoes 12,944 64% 2.5 d 26 h 159k
Oct 7, 2016 Hurricane Matthew 11,786 58% 16 h 13 h 106k
Jan 9, 2024 Windstorm 8,622 42% 29 h 15 h 74k
Aug 5, 2024 Hurricane Debby 3,721 18% 23 h 16 h 72k
Oct 11, 2018 Hurricane Michael 7,991 39% 18 h 8.8 h 48k
Apr 19, 2019 Thunderstorms 7,043 35% 19 h 11 h 39k
Jan 3, 2022 Windstorm 6,683 33% 14 h 9.0 h 33k
Jul 8, 2021 Hurricane Elsa 11,142 55% 16 h 1.5 h 32k

After the peak

How fast the lights come back

Each line is one major outage, from its peak. The amber line is the typical path.

0% 25% 50% 75% 100% peak+24h+48h+72h+96h half back by +4h 90% by +16h

When it happens

The outage clock

Customer-hours out by month (rings, January innermost) and local hour, 2018–2025.

00061218 Jan inside

What was happening

Weather behind the outages

Each outage is matched to NOAA storm reports for Colleton from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.

  • Tropical storm 61%
  • No storm on record 15%
  • Thunderstorms 10%
  • Tornadoes 7.7%
  • Windstorm 6.5%

Who keeps the lights on

Utilities serving Colleton

As each utility reports to the Energy Information Administration for its whole South Carolina territory, not this county alone. Outage minutes include major storm days.

Utility Type Outage min / yr Excl. major storms Outages / yr Residential ¢/kWh Customers
Dominion Energy South Carolina, Inc Investor Owned 131 81 1.34 16.4 713k
Coastal Electric Coop, Inc SC 387 153 2.65 15.4 141k
Edisto Electric Coop, Inc Cooperative 236 236 – 19.0 16k

EIA Form 861, latest year each utility reported. Outage minutes are SAIDI, the yearly minutes the average customer goes without power; outages a year are SAIFI.

Next door

Neighbouring counties

Across South Carolina

Where it is darkest

Hours / yr64+

All South Carolina counties →

About these numbers

Notes

Outages come from the EAGLE-I record of utility outage maps collected every 15 minutes by Oak Ridge National Laboratory. Hours without power are customer-hours divided by the county's 20,355 electricity customers. Averages use well-covered years from 2018. Outages shorter than 15 minutes, and utilities that publish no outage map, are not in the record, so these figures understate the total. How every number is made →