County annual report · FIPS 13135
2021 Gwinnett County, GA Power Outage Report
In 2021, customers in Gwinnett County, GA went without power for an average of 3.0 hours, a total of 668K customer-hours (Georgia average 2.4 hours). That ranks 70th worst of 159 Georgia counties and 1847th of 2,974 nationally.
Compared with GA, the US and 2020
Coverage line is EAGLE-I's share of Georgia customers tracked each year.
Biggest outages in Gwinnett County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 8, 2021 02:30 | September 9, 2021 04:30 | 1d 2h | 7,260 | 13K |
| 2 | December 11, 2021 09:45 | December 14, 2021 03:15 | 2d 17h | 6,970 | 24K |
| 3 | July 9, 2021 09:00 | July 10, 2021 23:15 | 1d 14h | 6,769 | 22K |
| 4 | October 11, 2021 12:00 | October 13, 2021 01:00 | 1d 13h | 5,960 | 5,793 |
| 5 | September 9, 2021 21:00 | September 11, 2021 04:00 | 1d 7h | 5,385 | 8,950 |
| 6 | August 25, 2021 12:15 | August 28, 2021 05:30 | 2d 17h | 5,336 | 7,287 |
| 7 | June 8, 2021 11:15 | June 10, 2021 04:45 | 1d 17h | 4,915 | 8,738 |
| 8 | August 10, 2021 10:45 | August 12, 2021 10:45 | 2d | 4,860 | 16K |
| 9 | July 13, 2021 10:00 | July 13, 2021 23:45 | 13h 45m | 4,476 | 1,709 |
| 10 | June 1, 2021 10:30 | June 3, 2021 01:15 | 1d 14h | 4,362 | 9,349 |
Outage episodes by size in 2021: 215 reached 100+ customers, 92 reached 1,000+ customers, 0 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Gwinnett County reported on EIA Form 861 for 2021, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Georgia Power Co | 2021 | 2.4 hrs | 1.28 | 2.4 hrs | 1.25 |
| Jackson Electric Member Corp - (GA) | 2021 | 66 min | 0.96 | 60 min | 0.93 |
| Walton Electric Member Corp | 2021 | 2.5 hrs | 1.56 | 2.0 hrs | 1.47 |
| Sawnee Electric Membership Corporation | 2021 | 39 min | 0.79 | 39 min | 0.79 |
| City of Norcross- (GA) | - | - | - | - | - |
| City of Buford | - | - | - | - | - |
| City of Lawrenceville - (GA) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 90% of Georgia's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 224,403 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Gwinnett County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Gwinnett County, GA annual power outage report, 2021, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2021/georgia/gwinnett-county