County annual report · FIPS 47063
2021 Hamblen County, TN Power Outage Report
In 2021, customers in Hamblen County, TN went without power for an average of 0.7 hours, a total of 25K customer-hours (Tennessee average 3.7 hours). That ranks 69th worst of 84 Tennessee counties and 2773rd of 2,974 nationally.
Compared with TN, the US and 2020
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Hamblen 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 | February 10, 2021 15:30 | February 10, 2021 16:30 | 1h | 2,835 | 2,193 |
| 2 | August 23, 2021 15:15 | August 23, 2021 21:00 | 5h 45m | 2,068 | 1,055 |
| 3 | June 10, 2021 13:45 | June 10, 2021 15:45 | 2h | 1,563 | 405 |
| 4 | June 23, 2021 16:00 | June 23, 2021 17:15 | 1h 15m | 1,536 | 391 |
| 5 | April 7, 2021 17:15 | April 7, 2021 18:45 | 1h 30m | 1,234 | 1,804 |
| 6 | May 4, 2021 13:00 | May 4, 2021 16:00 | 3h | 1,231 | 1,505 |
| 7 | September 25, 2021 14:45 | September 25, 2021 15:30 | 45m | 1,108 | 831 |
| 8 | July 12, 2021 14:45 | July 12, 2021 17:00 | 2h 15m | 1,102 | 553 |
| 9 | November 16, 2021 14:00 | November 16, 2021 16:15 | 2h 15m | 1,097 | 281 |
| 10 | September 12, 2021 11:45 | September 12, 2021 16:30 | 4h 45m | 1,046 | 1,531 |
Outage episodes by size in 2021: 24 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 Hamblen 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 |
|---|---|---|---|---|---|
| Appalachian Electric Coop | 2021 | 3.3 hrs | 2.57 | 3.3 hrs | 2.57 |
| Holston Electric Coop, Inc | 2021 | 2.4 hrs | 1.83 | 2.1 hrs | 1.70 |
| City of Morristown - (TN) | 2021 | 1.7 hrs | 1.60 | 51 min | 0.94 |
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 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 38,657 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. Hamblen County has data for 2016–2025.
Cite this report
MassOutage (massoutage.com), Hamblen County, TN 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/tennessee/hamblen-county