County annual report · FIPS 47065
2020 Hamilton County, TN Power Outage Report
In 2020, customers in Hamilton County, TN went without power for an average of 0.3 hours, a total of 63K customer-hours (Tennessee average 6.5 hours). That ranks 74th worst of 84 Tennessee counties and 2867th of 3,019 nationally.
Compared with TN, the US and 2019
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Hamilton County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 21, 2020 12:15 | October 21, 2020 17:15 | 5h | 4,715 | 2,466 |
| 2 | October 22, 2020 03:45 | October 22, 2020 07:15 | 3h 30m | 3,830 | 6,290 |
| 3 | May 5, 2020 04:00 | May 5, 2020 21:15 | 17h 15m | 2,130 | 5,122 |
| 4 | May 3, 2020 10:00 | May 3, 2020 12:15 | 2h 15m | 1,659 | 2,134 |
| 5 | December 16, 2020 18:45 | December 17, 2020 00:00 | 5h 15m | 1,561 | 996 |
| 6 | April 13, 2020 01:15 | April 14, 2020 02:30 | 1d 1h | 1,520 | 4,065 |
| 7 | November 20, 2020 18:45 | November 20, 2020 19:30 | 45m | 1,462 | 366 |
| 8 | May 14, 2020 21:45 | May 15, 2020 01:00 | 3h 15m | 1,408 | 1,411 |
| 9 | October 12, 2020 16:15 | October 12, 2020 17:30 | 1h 15m | 1,408 | 353 |
| 10 | May 14, 2020 04:00 | May 14, 2020 12:00 | 8h | 1,332 | 11K |
Outage episodes by size in 2020: 41 reached 100+ customers, 12 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 Hamilton County reported on EIA Form 861 for 2020, 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 | 2020 | 4.5 hrs | 2.74 | 52 min | 2.25 |
| City of Chattanooga - (TN) | 2020 | 19.9 hrs | 1.47 | 86 min | 0.71 |
| Sequachee Valley Electric Coop | 2020 | 6.1 hrs | 3.74 | 2.9 hrs | 2.50 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 73% of Tennessee's customers in 2020; 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, 2020, 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/2020/tennessee/hamilton-county