Gwinnett County Power Outage History
2014–2025 · Georgia
Average — typical outage frequency and duration nationally. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Oct 29, 2020 | 93 hrs | 102,982 (30%) | Tropical Storm Zeta |
| Sep 11, 2017 | 104 hrs | 101,504 (29%) | Tropical Storm Irma |
| Jul 21, 2018 | 12 hrs | 79,773 (23%) | Lightning |
| Jul 20, 2023 | 38 hrs | 44,637 (13%) | Thunderstorm Wind |
| Jan 5, 2018 | 2 hrs | 35,881 (10%) | Unnamed event |
Over the 12 years from 2014 to 2025, Gwinnett County recorded 2,713 distinct power outage events, averaging 2.1 hours per event.
The single worst outage on record in Gwinnett County started October 29, 2020 (Tropical Storm Zeta), lasting 93 hours and leaving up to 102,982 customers without power (30% of the county) at its peak.
July has historically been the worst month for outages in Gwinnett County, with 332 events recorded during that month across the dataset.
Based on this history, Gwinnett County earns a Reliability Grade of C, placing it in the 57th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Gwinnett County's outage profile
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Similar counties in Georgia
Counties with the closest reliability grade and national percentile to Gwinnett County.
| County | Grade | National percentile |
|---|---|---|
| Wheeler County | C | 57th |
| Coweta County | C | 58th |
| Thomas County | C | 56th |
| Clarke County | C | 58th |
| Carroll County | C | 58th |
FAQ
How often does power go out in Gwinnett County?
Between 2014 and 2025, Gwinnett County recorded 2,713 outage events, averaging 2.1 hours each.
What is Gwinnett County's reliability grade?
Gwinnett County has a Reliability Grade of C, in the 57th national percentile.
What was the worst power outage in Gwinnett County?
The worst outage on record started October 29, 2020 (Tropical Storm Zeta), lasting 93 hours and affecting up to 102,982 customers.