County annual report · FIPS 47179
2021 Washington County, TN Power Outage Report
In 2021, customers in Washington County, TN went without power for an average of 1.6 hours, a total of 134K customer-hours (Tennessee average 3.7 hours). That ranks 56th worst of 84 Tennessee counties and 2443rd 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 Washington 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 | April 28, 2021 13:15 | May 17, 2021 19:15 | 19d 6h | 3,988 | 6,970 |
| 2 | February 19, 2021 13:15 | February 23, 2021 21:45 | 4d 8h | 3,397 | 2,314 |
| 3 | June 25, 2021 11:15 | June 25, 2021 17:15 | 6h | 3,229 | 968 |
| 4 | February 24, 2021 13:30 | March 9, 2021 22:00 | 13d 8h | 2,740 | 14K |
| 5 | June 30, 2021 11:45 | July 12, 2021 12:15 | 12d | 1,682 | 9,326 |
| 6 | December 7, 2021 13:45 | December 13, 2021 23:00 | 6d 9h | 1,480 | 10K |
| 7 | August 11, 2021 23:15 | August 27, 2021 20:30 | 15d 21h | 1,446 | 6,266 |
| 8 | June 25, 2021 21:15 | June 26, 2021 02:15 | 5h | 1,345 | 1,076 |
| 9 | May 28, 2021 16:00 | June 4, 2021 18:45 | 7d 2h | 1,335 | 3,923 |
| 10 | October 25, 2021 10:45 | November 13, 2021 03:00 | 18d 16h | 1,301 | 5,334 |
Outage episodes by size in 2021: 51 reached 100+ customers, 18 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 Washington 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 |
|---|---|---|---|---|---|
| Johnson City - (TN) | 2021 | 20 min | 0.25 | 20 min | 0.25 |
| Kingsport Power Co | 2021 | 3.8 hrs | 1.29 | 3.8 hrs | 1.29 |
| City of Elizabethton - (TN) | - | - | - | - | - |
| Town of Erwin - (TN) | - | - | - | - | - |
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 ÷ 86,325 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. Washington County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Washington 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/washington-county