County annual report · FIPS 47057
2024 Grainger County, TN Power Outage Report
In 2024, customers in Grainger County, TN went without power for an average of 22.9 hours, a total of 288K customer-hours (Tennessee average 4.8 hours). That ranks 3rd worst of 84 Tennessee counties and 435th of 2,990 nationally.
Compared with TN, the US and 2023
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Grainger County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 27, 2024 04:15 | October 2, 2024 02:30 | 4d 22h | 5,826 | 168K |
| 2 | May 2, 2024 16:00 | May 2, 2024 17:45 | 1h 45m | 3,908 | 5,759 |
| 3 | May 8, 2024 14:15 | May 10, 2024 15:30 | 2d 1h | 2,741 | 16K |
| 4 | May 26, 2024 21:00 | May 28, 2024 02:00 | 1d 5h | 2,610 | 19K |
| 5 | April 12, 2024 02:15 | April 12, 2024 08:15 | 6h | 2,219 | 3,503 |
| 6 | July 30, 2024 20:30 | August 1, 2024 08:00 | 1d 11h | 1,863 | 15K |
| 7 | November 6, 2024 18:45 | November 7, 2024 01:45 | 7h | 1,663 | 2,010 |
| 8 | June 12, 2024 17:15 | June 12, 2024 20:00 | 2h 45m | 1,624 | 1,019 |
| 9 | July 17, 2024 20:15 | July 18, 2024 04:15 | 8h | 1,359 | 1,492 |
| 10 | August 31, 2024 23:00 | September 1, 2024 06:45 | 7h 45m | 1,358 | 4,138 |
Outage episodes by size in 2024: 58 reached 100+ customers, 11 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 2024, 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 | 2024 | 8.4 hrs | 4.97 | 1.7 hrs | 3.38 |
| Knoxville Utilities Board | 2024 | 5.9 hrs | 1.86 | 3.2 hrs | 1.40 |
| Appalachian Electric Coop | 2024 | 15.5 hrs | 3.67 | 4.9 hrs | 2.86 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Tennessee's customers in 2024; 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, 2024, 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/2024/tennessee/grainger-county