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

Power outage history

Berkeley County South Carolina

2.6hours

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

45th most of 46 in South Carolina 61% below the national median

Worst outage on record Hurricane Dorian · Sep 5, 2019 24% of customers out · 90% back in 27 hours
Hours without power, average customer per year 2.6h / yr State average 9.6 h · national median 6.6 h
Major outages a year 0.9 Peaks over 10% of customers or 50,000 customers
Typical time to restore 90% 7hours Median across major outages, from the peak
Longest single outage 2.1days Hurricane Matthew, over 1% of customers out
Outage hours on storm days 76% Share falling on days with a NOAA storm report here
Worst year 2019 6.1 hours without power, average customer
Electricity customers 162,211 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 Berkeley'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

2019 was the worst well-recorded year, at 6.1 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Berkeley, hours without power per customer

BerkeleyUS median countySouth Carolina average
0 2 4 6 8 10 12 0.2 ’15 2.4 ’16 1.2 ’17 1.6 ’18 6.1 ’19 2.9 ’20 1.1 ’21 2.7 ’22 1.1 ’23 3.0 ’24 2.3 ’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 5, 2019 Hurricane Dorian 38,691 24% 43 h 27 h 693k
Sep 30, 2022 Hurricane Ian 35,327 22% 33 h 9.2 h 268k
Oct 8, 2016 Hurricane Matthew 13,599 8% 2.1 d 2.3 d 264k
Apr 13, 2020 Tornadoes 21,751 13% 12 h 9.0 h 138k
Sep 27, 2024 Hurricane Helene 16,723 10% 16 h 12 h 128k
Sep 11, 2017 Tropical storm 17,445 11% 29 h 4.2 h 118k
Jun 10, 2024 Thunderstorms 8,488 5% 15 h 22 h 66k
Dec 7, 2024 No storm report 8,707 5% 11 h 9.0 h 64k
Oct 8, 2016 Hurricane Matthew 12,975 8% 13 h 13 h 55k
Jul 24, 2018 No storm report 8,306 5% 4.2 h 4.2 h 31k
Jun 9, 2025 Thunderstorms 17,921 11% 4.0 h 2.2 h 24k
Sep 19, 2025 No storm report 13,808 9% 1.8 h 2.8 h 22k

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 +6h 90% by +10h

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 Berkeley from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.

  • Tropical storm 60%
  • No storm on record 24%
  • Tornadoes 7.3%
  • Thunderstorms 6.9%
  • Windstorm 1.3%

Who keeps the lights on

Utilities serving Berkeley

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
South Carolina Public Service Authority State 43 41 0.69 12.9 189k
Berkeley Electric Coop Inc Cooperative 114 93 1.38 16.3 120k
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 162,211 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 →