County annual report · FIPS 13067
2019 Cobb County, GA Power Outage Report
In 2019, customers in Cobb County, GA went without power for an average of 1.0 hours, a total of 331K customer-hours (Georgia average 2.5 hours). That ranks 131st worst of 159 Georgia counties and 2483rd of 2,945 nationally.
Compared with GA, the US and 2018
Coverage line is EAGLE-I's share of Georgia customers tracked each year.
Biggest outages in Cobb County, 2019
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 14, 2019 00:00 | September 15, 2019 10:45 | 1d 10h | 6,735 | 71K |
| 2 | September 26, 2019 11:00 | September 28, 2019 00:30 | 1d 13h | 6,293 | 5,259 |
| 3 | April 2, 2019 12:45 | April 2, 2019 22:30 | 9h 45m | 5,634 | 1,486 |
| 4 | December 3, 2019 14:30 | December 3, 2019 22:30 | 8h | 4,090 | 8,235 |
| 5 | June 24, 2019 11:00 | June 26, 2019 00:45 | 1d 13h | 3,784 | 5,672 |
| 6 | October 17, 2019 09:45 | October 17, 2019 22:00 | 12h 15m | 3,431 | 2,949 |
| 7 | August 14, 2019 22:45 | August 16, 2019 00:30 | 1d 1h | 3,284 | 2,091 |
| 8 | January 19, 2019 10:30 | January 20, 2019 22:45 | 1d 12h | 2,901 | 10K |
| 9 | September 9, 2019 08:45 | September 9, 2019 12:00 | 3h 15m | 2,850 | 1,433 |
| 10 | January 4, 2019 09:15 | January 5, 2019 18:15 | 1d 9h | 2,816 | 5,723 |
Outage episodes by size in 2019: 146 reached 100+ customers, 45 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 Cobb County reported on EIA Form 861 for 2019, 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 | 2018 | 3.8 hrs | 1.48 | 2.1 hrs | 1.21 |
| GreyStone Power Corporation | 2018 | 2.7 hrs | 1.50 | 1.7 hrs | 1.31 |
| Cobb Electric Membership Corp | 2018 | 31 min | 0.50 | 31 min | 0.50 |
| City of Marietta - (GA) | 2018 | 1.7 hrs | 1.54 | 1.7 hrs | 1.54 |
| 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 86% of Georgia's customers in 2019; 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, 2019, 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/2019/georgia/cobb-county