Power Outages in Grainger County, TN
As of the latest utility report, no major power outages are reported in Grainger County, TN. In 2025, the average customer here lost power for about 3.6 hours.
Grainger County, TN is served by 1 tracked utility.
No active power outages are currently reported in Grainger County.
No active NWS alerts for Grainger County right now.
Grainger County has been under 8 National Weather Service alerts recently — most recently a Flood Watch on July 13, 2026.
- Flood Watch ×7
- Flash Flood Warning ×1
Hardest-hit cities in Grainger County
Where this event is concentrated across the county's towns and townships.
Historical reliability
In 2025, the average customer in Grainger County went about 3.6 hours without power. Peak simultaneous outage on record reached 5,826 customers.
Worst year here was 2024 (peak 5,826 customers out) · decade average 5.1 hrs without power per customer/yr.
| Year | Outage events | Peak customers out | Avg hrs/customer |
|---|---|---|---|
| 2015 | 83 | 308 | 0.4 |
| 2016 | 167 | 497 | 1.5 |
| 2017 | 159 | 840 | 2.9 |
| 2018 | 202 | 902 | 2.0 |
| 2019 | 215 | 1,257 | 3.5 |
| 2020 | 285 | 1,145 | 2.9 |
| 2021 | 305 | 2,335 | 2.4 |
| 2022 | 445 | 4,225 | 6.9 |
| 2023 | 593 | 2,514 | 7.1 |
| 2024 | 559 | 5,826 | 22.9 |
| 2025 | 330 | 1,946 | 3.6 |
Relatively Low ice storms exposure · 5.1 hrs/yr of outages over the last decade.
FEMA rates this county’s social vulnerability relatively high — outages hit harder where communities are less able to respond and recover.
All hazard rankings →Power outages in Grainger County: FAQ
- How often does Grainger County, TN lose power?
- Based on EAGLE-I records, Grainger County, TN logged 330 distinct outage events in 2025, averaging about 3.6 hours without power per customer over the year.
- What was the worst power outage in Grainger County, TN?
- The largest tracked outage peaked at 5,826 customers without power, beginning September 27, 2024 and lasting about 4d 22h.
- Is there a power outage in Grainger County, TN right now?
- No major outage is currently reported for Grainger County, TN. Live coverage depends on whether local utilities report to ODIN.
- Which utilities serve Grainger County, TN?
- Tracked electric providers include KNOXVILLE UTILITIES BOARD.
Outages are tracked at the county level; these ZIP codes fall within Grainger County.
37708, 37709, 37848, 37861, 37881, 37888
Electric providers serving this county
From EIA-861 service territory, with official reliability where reported.
| Provider | Official SAIDI (EIA) | Live | Report outage |
|---|---|---|---|
| KNOXVILLE UTILITIES BOARD | — | ODIN ✓ | — |
Machine-readable data: /api/v1/counties/47057 and /api/v1/counties/47057/history. Historical figures derive from the DOE/ORNL EAGLE-I dataset (EAGLE-I tracked roughly 0% of Tennessee customers).