County annual report · FIPS 13067
2024 Cobb County, GA Power Outage Report
In 2024, customers in Cobb County, GA went without power for an average of 2.7 hours, a total of 875K customer-hours (Georgia average 25.8 hours). That ranks 140th worst of 159 Georgia counties and 2186th of 2,990 nationally.
Compared with GA, the US and 2023
Coverage line is EAGLE-I's share of Georgia customers tracked each year.
Biggest outages in Cobb County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 29, 2024 06:45 | August 4, 2024 13:45 | 6d 7h | 14,648 | 86K |
| 2 | January 4, 2024 07:45 | January 5, 2024 00:45 | 17h | 13,139 | 3,952 |
| 3 | September 25, 2024 08:45 | September 29, 2024 03:45 | 3d 19h | 9,186 | 102K |
| 4 | December 29, 2024 09:15 | December 31, 2024 02:45 | 1d 17h | 8,074 | 53K |
| 5 | April 10, 2024 22:15 | April 13, 2024 10:30 | 2d 12h | 6,307 | 51K |
| 6 | January 25, 2024 01:15 | January 26, 2024 03:15 | 1d 2h | 6,288 | 29K |
| 7 | July 17, 2024 10:30 | July 21, 2024 09:15 | 3d 22h | 5,665 | 28K |
| 8 | August 16, 2024 06:15 | August 20, 2024 02:30 | 3d 20h | 5,539 | 28K |
| 9 | August 29, 2024 08:45 | August 31, 2024 16:30 | 2d 7h | 4,515 | 26K |
| 10 | February 28, 2024 11:30 | February 29, 2024 10:30 | 23h | 4,472 | 23K |
Outage episodes by size in 2024: 191 reached 100+ customers, 75 reached 1,000+ customers, 2 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 Cobb County reported on EIA Form 861 for 2024, 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 | 2024 | 25.3 hrs | 2.07 | 2.1 hrs | 1.02 |
| GreyStone Power Corporation | 2024 | 1.9 hrs | 1.50 | 1.6 hrs | 1.38 |
| Cobb Electric Membership Corp | 2024 | 60 min | 0.99 | 35 min | 0.75 |
| City of Marietta - (GA) | 2024 | 2.1 hrs | 1.69 | 2.1 hrs | 1.69 |
| City of Acworth - (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 n/a of Georgia's customers in 2024; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 322,249 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. Cobb County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Cobb County, GA annual power outage report, 2024, 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/2024/georgia/cobb-county