County annual report · FIPS 47065
2023 Hamilton County, TN Power Outage Report
In 2023, customers in Hamilton County, TN went without power for an average of 2.4 hours, a total of 442K customer-hours (Tennessee average 11.1 hours). That ranks 61st worst of 83 Tennessee counties and 2167th of 2,977 nationally.
Compared with TN, the US and 2022
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Hamilton County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | November 13, 2023 13:30 | November 15, 2023 02:00 | 1d 12h | 35,366 | 18K |
| 2 | August 7, 2023 12:00 | August 9, 2023 08:30 | 1d 20h | 25,252 | 85K |
| 3 | August 12, 2023 08:30 | August 13, 2023 16:45 | 1d 8h | 16,961 | 13K |
| 4 | July 6, 2023 11:15 | July 9, 2023 01:45 | 2d 14h | 6,165 | 13K |
| 5 | July 1, 2023 03:45 | July 4, 2023 19:00 | 3d 15h | 4,453 | 81K |
| 6 | November 23, 2023 12:45 | November 23, 2023 16:00 | 3h 15m | 4,236 | 4,241 |
| 7 | August 9, 2023 11:45 | August 12, 2023 02:15 | 2d 14h | 4,038 | 6,429 |
| 8 | July 6, 2023 07:30 | July 6, 2023 09:00 | 1h 30m | 3,634 | 1,817 |
| 9 | July 28, 2023 11:30 | July 29, 2023 01:00 | 13h 30m | 2,850 | 866 |
| 10 | March 3, 2023 14:00 | March 6, 2023 00:00 | 2d 10h | 2,573 | 39K |
Outage episodes by size in 2023: 119 reached 100+ customers, 30 reached 1,000+ customers, 3 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 Hamilton County reported on EIA Form 861 for 2023, 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 |
|---|---|---|---|---|---|
| Volunteer Electric Coop | 2023 | 17.6 hrs | 6.37 | 7.2 hrs | 5.15 |
| City of Chattanooga - (TN) | 2021 | 73 min | 0.60 | 59 min | 0.53 |
| Sequachee Valley Electric Coop | 2023 | 8.1 hrs | 3.42 | 3.8 hrs | 2.98 |
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 Tennessee's customers in 2023; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 187,870 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. Hamilton County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Hamilton County, TN annual power outage report, 2023, 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/2023/tennessee/hamilton-county