County annual report · FIPS 47057
2022 Grainger County, TN Power Outage Report
In 2022, customers in Grainger County, TN went without power for an average of 6.9 hours, a total of 86K customer-hours (Tennessee average 9.2 hours). That ranks 27th worst of 84 Tennessee counties and 1065th of 2,976 nationally.
Compared with TN, the US and 2021
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Grainger County, 2022
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 23, 2022 06:00 | December 24, 2022 07:45 | 1d 1h | 4,225 | 6,398 |
| 2 | December 24, 2022 10:00 | December 24, 2022 19:45 | 9h 45m | 2,781 | 4,533 |
| 3 | July 7, 2022 08:15 | July 8, 2022 18:00 | 1d 9h | 1,510 | 6,292 |
| 4 | September 13, 2022 18:00 | September 13, 2022 18:15 | 15m | 1,343 | 336 |
| 5 | April 15, 2022 06:30 | April 15, 2022 15:45 | 9h 15m | 1,328 | 3,108 |
| 6 | November 19, 2022 18:15 | November 19, 2022 21:45 | 3h 30m | 1,219 | 1,223 |
| 7 | January 23, 2022 15:00 | January 23, 2022 15:45 | 45m | 1,150 | 443 |
| 8 | June 25, 2022 13:00 | June 26, 2022 00:00 | 11h | 1,118 | 3,125 |
| 9 | September 24, 2022 23:30 | September 25, 2022 00:00 | 30m | 942 | 471 |
| 10 | October 3, 2022 13:00 | October 3, 2022 19:45 | 6h 45m | 938 | 257 |
Outage episodes by size in 2022: 57 reached 100+ customers, 8 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 Grainger County reported on EIA Form 861 for 2022, 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 |
|---|---|---|---|---|---|
| Powell Valley Electric Coop | 2022 | 2.5 hrs | 2.45 | 2.3 hrs | 1.82 |
| Knoxville Utilities Board | 2022 | 4.2 hrs | 2.19 | 1.7 hrs | 1.31 |
| Appalachian Electric Coop | 2022 | 7.0 hrs | 4.70 | 4.2 hrs | 2.93 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 75% of Tennessee's customers in 2022; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 12,567 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. Grainger County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Grainger County, TN annual power outage report, 2022, 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/2022/tennessee/grainger-county