Median AQI
36
Good
Tennessee · County air quality · 2025
Claiborne County, Tennessee
Median AQI 36 (Good). 96.3% of monitored days rated Good, direct from EPA Air Quality System stations.
- 36
- Median AQI
- 96.3%
- Good-air days
- 0
- Unhealthy days
- 92%
- Cleaner than US counties
The verdict
According to EPA Air Quality System monitoring data, Claiborne County's air is good on balance, among the cleanest 10% of US counties, a median AQI of 36 with 96.3% of 241 monitored days in the Good band, driven mainly by Ozone.
- 36
- median AQI · Good
- 96.3%
- days rated Good
- Ozone
- main pollutant
- 92%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 100.
Data updated July 2026
- Good · 232 d · 96.3%
- Moderate · 9 d · 3.7%
How did Claiborne County's air break down in 2025?
Across 241 monitored days, 232 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 100 (Moderate).
EPA AQS →Air quality data from EPA Air Quality System (2025). 241 days monitored. Median AQI: 36 (Good).
Insights: Claiborne County, Tennessee. EPA monitors recorded a median Air Quality Index of 36 across 241 measured days in 2025, earning a Good classification and a Excellent health grade. Of those days, 232 (96%) fell in the Good band (AQI 0–50), 9 (4%) registered Moderate readings, and 0 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 46, while the worst single-day peak hit 100 (Moderate). Residents averaged about 28.9 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as Ozone (241 days). Across the 2020–2025 trend window, good days shifted by -111 and the median AQI moved +4 points, placing the multi-year trajectory at worsening. The worst single reading over the 2020–2025 window was AQI 100, moderate but never Unhealthy. Nearby counties show comparable readings: Anderson (91.0% good, AQI 42); Blount (69.6% good, AQI 46); Davidson (51.8% good, AQI 50); DeKalb (95.4% good, AQI 35); Dyer (79.4% good, AQI 34); Hamilton (64.1% good, AQI 45).
Air Quality Summary
Good Days
96.3%
232 of 241 monitored days
21.3pp vs 75% target
Max AQI Recorded
100
Moderate
Health Grade
Excellent
90th-pct AQI 46
Claiborne County, Good days share 96.3%
National avg
Share of monitored days at AQI 0-50 (Good band).
Claiborne County, Unhealthy-or-worse share 0.0%
National avg
Share of monitored days above AQI 150 (Unhealthy or worse). Bar maxes at 10% (worst-county ceiling).
AQI Day Breakdown (2025)
Distribution of 241 monitored days across EPA AQI categories.
Good
232
96%
Moderate
9
4%
USG
0
0%
Unhealthy
0
0%
Very Unhealthy
0
0%
Hazardous
0
0%
Pollutant Breakdown
Days where each pollutant was the primary driver of AQI readings in Claiborne County.
- Ozone · 241 days · 100.0%
Health Impact Assessment
Excellent
Claiborne County's air quality is rated Excellent based on 96.3% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 96.3% of monitored days in 2025, with a median AQI of 36. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is Ozone, driving AQI on 241 of 241 monitored days.
5-Year Air Quality Trend
Air quality is worsening in Claiborne County. Best year: 2022 (355 good days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 343 | 2 | 0 | 0 | 32 | 51 |
| 2021 | 339 | 18 | 0 | 0 | 34 | 71 |
| 2022 | 355 | 8 | 0 | 0 | 34 | 74 |
| 2023 | 324 | 25 | 2 | 0 | 38 | 105 |
| 2024 | 336 | 14 | 0 | 0 | 36 | 67 |
| 2025 | 232 | 9 | 0 | 0 | 36 | 100 |
How does Claiborne County compare?
How Claiborne County compares
Good-day share better than US avg
Claiborne County 96.3%
Anderson County, Tennessee 91.0%
US average 76.5%
Median AQI better than US avg
Claiborne County 36
Anderson County, Tennessee 42
US average 38
Unhealthy days / yr about average
Claiborne County 0
Anderson County, Tennessee 0
US average 0
Other Counties in Tennessee
Air quality comparison for nearby counties in Tennessee.
Counties with Similar Air Quality
Counties across the US with a similar median AQI to Claiborne County.
Aroostook County, Maine
AQI 36 · 84.1% good
Berkeley County, South Carolina
AQI 36 · 92.2% good
Carter County, Kentucky
AQI 36 · 89.8% good
Clark County, Illinois
AQI 36 · 92.1% good
Cobb County, Georgia
AQI 36 · 92.5% good
Fauquier County, Virginia
AQI 36 · 97.2% good
What Claiborne County's air means for you
The air here stays in the breathable range year-round, with Ozone the main thing to watch.
- Sensitive groups (asthma, heart conditions, children, older adults) should check the AQI on high-Ozone days, the guide explains what a median of 36 means for exposure. Health guidance
- See how Claiborne County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Claiborne County with its Tennessee neighbours before drawing a conclusion about the region. All of Tennessee
Based on 241 EPA-monitored days in 2025; figures reflect only days the monitors reported. Source: EPA Air Quality System annual summaries.
More Air Quality Data
Air Quality Guides
Frequently Asked Questions
What is the air quality in Claiborne County, Tennessee? ▼
Claiborne County has a median Air Quality Index (AQI) of 36, rated "Good." 96.3% of monitored days (232 out of 241) had good air quality in 2025.
What is the main pollutant in Claiborne County? ▼
The primary pollutant in Claiborne County is Ozone (O3), which was the main AQI driver on 241 days (100% of monitored days). Can trigger asthma, reduce lung function, and cause chest pain.
How many unhealthy air days does Claiborne County have? ▼
In 2025, Claiborne County recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 100.
Is the air quality in Claiborne County getting better or worse? ▼
Air quality in Claiborne County is worsening based on 5-year trends (2020-2025). Best year: 2022 with 355 good days. Worst year: 2025 with 232 good days.
What does AQI 36 mean for health? ▼
Claiborne County's median AQI of 36 falls in the "Good" category. See the <a href="/guides/understanding-aqi" class="underline">AQI category guide</a> for what each range means for health.
How does Claiborne County compare to other counties in Tennessee? ▼
Claiborne County has 96.3% good air days. Nearby counties in Tennessee: Anderson (91.0% good), Blount (69.6% good), Davidson (51.8% good), DeKalb (95.4% good), Dyer (79.4% good), Hamilton (64.1% good).
What is the 90th percentile AQI in Claiborne County? ▼
The 90th percentile AQI for Claiborne County is 46, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 100 (Moderate).
Data Sources
Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by County dataset, 2020–2025 (aqs.epa.gov). For current conditions (not shown here — this page is historical annual data), see EPA AirNow (airnow.gov). See our methodology for how AQI, median, and coverage figures are computed.
Informational only, not professional advice. Data from EPA AQS. See our disclaimer.
Every figure on PlainAir is rendered directly from EPA AQS air-quality monitoring data, no number is typed in by an editor. This page draws directly on EPA AQS air-quality monitoring data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.