County annual report · FIPS 47159
2021 Smith County, TN Power Outage Report
In 2021, customers in Smith County, TN went without power for an average of 0.3 hours, a total of 2,977 customer-hours (Tennessee average 3.7 hours). That ranks 73rd worst of 84 Tennessee counties and 2844th 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 Smith 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 | December 11, 2021 10:15 | December 11, 2021 20:15 | 10h | 245 | 1,801 |
| 2 | May 4, 2021 16:15 | May 4, 2021 19:45 | 3h 30m | 140 | 351 |
| 3 | August 3, 2021 15:45 | August 3, 2021 16:15 | 30m | 86 | 43 |
| 4 | March 15, 2021 18:00 | March 15, 2021 19:15 | 1h 15m | 85 | 106 |
| 5 | February 21, 2021 16:30 | February 21, 2021 16:45 | 15m | 84 | 21 |
| 6 | June 29, 2021 19:45 | June 29, 2021 20:45 | 1h | 84 | 84 |
| 7 | June 20, 2021 21:30 | June 20, 2021 23:00 | 1h 30m | 79 | 116 |
| 8 | May 28, 2021 17:30 | May 28, 2021 20:00 | 2h 30m | 77 | 193 |
| 9 | August 1, 2021 23:00 | August 1, 2021 23:15 | 15m | 69 | 17 |
| 10 | May 29, 2021 04:30 | May 29, 2021 06:00 | 1h 30m | 64 | 96 |
Outage episodes by size in 2021: 2 reached 100+ customers, 0 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 Smith 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 |
|---|---|---|---|---|---|
| Tri-County Elec Member Corp (TN) | 2021 | 4.2 hrs | 2.98 | 3.9 hrs | 2.89 |
| Middle Tennessee E M C | 2021 | 65 min | 1.00 | 55 min | 0.96 |
| Upper Cumberland E M C | 2021 | 14.4 hrs | - | 2.0 hrs | - |
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 ÷ 8,588 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. Smith County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Smith 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/smith-county