Power outage history
Gwinnett County Georgia
3.3hours
without power for the average customer in a typical year, 2018–2025
130th most of 156 in Georgia 51% below the national median
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 Gwinnett's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2020 was the worst well-recorded year, at 6.6 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Gwinnett, hours without power per customer
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 11, 2017 | Hurricane Irma | 101,504 | 29% | 3.0 d | 2.0 d | 2.5M |
| Oct 29, 2020 | Hurricane Zeta | 102,982 | 30% | 2.4 d | 39 h | 1.5M |
| Feb 16, 2015 | Ice storm | 33,065 | 10% | 20 h | 13 h | 339k |
| Jul 20, 2023 | Thunderstorms | 44,637 | 13% | 24 h | 20 h | 292k |
| Jan 10, 2025 | No storm report | 15,704 | 5% | 20 h | 15 h | 231k |
| Sep 27, 2024 | Hurricane Helene | 26,782 | 8% | 19 h | 14 h | 209k |
| Jun 1, 2018 | Thunderstorms | 27,328 | 8% | 18 h | 18 h | 188k |
| Mar 21, 2017 | Thunderstorms | 27,200 | 8% | 9.0 h | 8.5 h | 150k |
| Jan 3, 2022 | No storm report | 24,020 | 7% | 11 h | 9.8 h | 143k |
| Jun 27, 2020 | Thunderstorms | 20,615 | 6% | 9.5 h | 14 h | 91k |
| Feb 16, 2025 | No storm report | 19,019 | 6% | 8.2 h | 8.8 h | 86k |
| Jun 7, 2025 | Thunderstorms | 23,207 | 7% | 7.2 h | 8.5 h | 75k |
| May 13, 2023 | No storm report | 5,770 | 2% | 12 h | 3.0 h | 67k |
| Jul 21, 2018 | Thunderstorms | 21,954 | 6% | 7.0 h | 6.2 h | 65k |
| Jan 16, 2022 | Winter storm | 20,152 | 6% | 5.5 h | 3.0 h | 60k |
| Jun 25, 2023 | Thunderstorms | 13,196 | 4% | 5.8 h | 8.0 h | 57k |
| Dec 23, 2022 | No storm report | 15,444 | 4% | 6.8 h | 5.8 h | 56k |
| Jul 30, 2024 | No storm report | 17,113 | 5% | 6.2 h | 6.2 h | 53k |
| Jun 17, 2022 | Thunderstorms | 12,898 | 4% | 7.2 h | 10 h | 45k |
| Mar 12, 2022 | No storm report | 11,713 | 3% | 5.8 h | 11 h | 40k |
| Nov 17, 2018 | No storm report | 3,663 | 1% | 11 h | – | 39k |
| Apr 19, 2019 | Thunderstorms | 11,514 | 3% | 6.0 h | 5.0 h | 35k |
| Apr 8, 2018 | No storm report | 5,746 | 2% | 6.0 h | 5.8 h | 34k |
| Jan 8, 2024 | No storm report | 9,388 | 3% | 3.8 h | 3.2 h | 28k |
| Feb 9, 2025 | No storm report | 3,600 | 1% | 7.5 h | – | 27k |
| Aug 17, 2024 | Thunderstorms | 9,528 | 3% | 4.2 h | 6.2 h | 27k |
| Jun 30, 2024 | No storm report | 11,685 | 3% | 3.2 h | 3.0 h | 24k |
| Feb 11, 2023 | No storm report | 10,160 | 3% | 3.2 h | 3.0 h | 21k |
| Aug 9, 2018 | Thunderstorms | 9,686 | 3% | 2.8 h | 5.0 h | 20k |
| Oct 11, 2020 | Tornadoes | 7,164 | 2% | 4.0 h | 14 h | 20k |
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.
When it happens
The outage clock
Customer-hours out by month (rings, January innermost) and local hour, 2018–2025.
What was happening
Weather behind the outages
Each outage is matched to NOAA storm reports for Gwinnett from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Tropical storm 40%
- No storm on record 33%
- Thunderstorms 24%
- Winter storm 1.5%
Who keeps the lights on
Utilities serving Gwinnett
As each utility reports to the Energy Information Administration for its whole Georgia territory, not this county alone. Outage minutes include major storm days.
| Utility | Type | Outage min / yr | Excl. major storms | Outages / yr | Residential ¢/kWh | Customers |
|---|---|---|---|---|---|---|
| Georgia Power Co | Investor Owned | 287 | 155 | 1.83 | 16.3 | 2.5M |
| Jackson Electric Member Corp | Cooperative | 217 | 74 | 1.22 | 11.9 | 246k |
| Sawnee Electric Membership Corporation | Cooperative | 66 | 31 | 1.13 | 12.8 | 183k |
| Walton Electric Member Corp | Cooperative | 307 | 164 | 2.65 | 14.1 | 134k |
| City of Norcross | GA | – | – | – | 11.6 | 53k |
| City of Lawrenceville | Municipal | – | – | – | 15.0 | 15k |
| City of Buford | Municipal | – | – | – | 13.4 | 3.0k |
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.
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 344,972 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 →