County annual report · FIPS 47009
2021 Blount County, TN Power Outage Report
In 2021, customers in Blount County, TN went without power for an average of 2.5 hours, a total of 174K customer-hours (Tennessee average 3.7 hours). That ranks 47th worst of 84 Tennessee counties and 2051st 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 Blount 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 | October 22, 2021 19:00 | October 22, 2021 23:45 | 4h 45m | 7,907 | 13K |
| 2 | December 11, 2021 06:00 | December 12, 2021 13:45 | 1d 7h | 5,768 | 21K |
| 3 | July 7, 2021 10:45 | July 8, 2021 00:00 | 13h 15m | 5,699 | 1,924 |
| 4 | June 21, 2021 21:30 | June 22, 2021 06:30 | 9h | 4,093 | 3,129 |
| 5 | October 4, 2021 07:15 | October 4, 2021 23:45 | 16h 30m | 3,377 | 2,637 |
| 6 | October 31, 2021 13:45 | October 31, 2021 15:30 | 1h 45m | 3,081 | 2,320 |
| 7 | August 25, 2021 21:30 | August 25, 2021 23:00 | 1h 30m | 1,958 | 1,271 |
| 8 | August 21, 2021 13:30 | August 22, 2021 18:30 | 1d 5h | 1,863 | 3,630 |
| 9 | October 25, 2021 19:30 | October 25, 2021 21:30 | 2h | 1,836 | 3,246 |
| 10 | May 5, 2021 04:00 | May 11, 2021 08:15 | 6d 4h | 1,824 | 9,058 |
Outage episodes by size in 2021: 137 reached 100+ customers, 20 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 Blount 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 |
|---|---|---|---|---|---|
| Knoxville Utilities Board | 2021 | 2.4 hrs | - | 1.9 hrs | - |
| Fort Loudoun Electric Coop | 2021 | 4.5 hrs | 2.56 | 4.5 hrs | 2.56 |
| Sevier County Electric System | 2021 | 3.7 hrs | 2.10 | 3.2 hrs | 2.00 |
| Maryville Utilities | 2021 | 88 min | 1.37 | 56 min | 0.94 |
| City of Alcoa Utilities | - | - | - | - | - |
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 ÷ 70,519 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. Blount County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Blount 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/blount-county