Median AQI
40
Good
Kentucky · County air quality · 2025
Livingston County, Kentucky
Median AQI 40 (Good). 95.3% of monitored days rated Good, direct from EPA Air Quality System stations.
- 40
- Median AQI
- 95.3%
- Good-air days
- 0
- Unhealthy days
- 90%
- Cleaner than US counties
The verdict
According to EPA Air Quality System monitoring data, Livingston County's air is good on balance, among the cleanest 10% of US counties, a median AQI of 40 with 95.3% of 106 monitored days in the Good band, driven mainly by Ozone.
- 40
- median AQI · Good
- 95.3%
- days rated Good
- Ozone
- main pollutant
- 90%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 67.
Data updated July 2026
- Good · 101 d · 95.3%
- Moderate · 5 d · 4.7%
How did Livingston County's air break down in 2025?
Across 106 monitored days, 101 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 67 (Moderate).
EPA AQS →Air quality data from EPA Air Quality System (2025). 106 days monitored. Median AQI: 40 (Good).
Insights: Livingston County, Kentucky. EPA monitors recorded a median Air Quality Index of 40 across 106 measured days in 2025, earning a Good classification and a Excellent health grade. Of those days, 101 (95%) fell in the Good band (AQI 0–50), 5 (5%) registered Moderate readings, and 0 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 49, while the worst single-day peak hit 67 (Moderate). Residents averaged about 28.6 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as Ozone (106 days). Across the 2020–2025 trend window, good days shifted by -134 and the median AQI moved +3 points, placing the multi-year trajectory at stable. The worst single reading over the 2020–2025 window was AQI 67, moderate but never Unhealthy. Nearby counties show comparable readings: Bell (63.5% good, AQI 43); Boone (95.1% good, AQI 38); Boyd (82.8% good, AQI 39); Bullitt (92.7% good, AQI 39); Campbell (78.5% good, AQI 39); Carter (89.8% good, AQI 36).
Air Quality Summary
Good Days
95.3%
101 of 106 monitored days
20.3pp vs 75% target
Max AQI Recorded
67
Moderate
Health Grade
Excellent
90th-pct AQI 49
Livingston County, Good days share 95.3%
National avg
Share of monitored days at AQI 0-50 (Good band).
Livingston 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 106 monitored days across EPA AQI categories.
Good
101
95%
Moderate
5
5%
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 Livingston County.
- Ozone · 106 days · 100.0%
Health Impact Assessment
Excellent
Livingston County's air quality is rated Excellent based on 95.3% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 95.3% of monitored days in 2025, with a median AQI of 40. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is Ozone, driving AQI on 106 of 106 monitored days.
5-Year Air Quality Trend
Air quality is stable in Livingston County. Best year: 2020 (235 good days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 235 | 12 | 1 | 0 | 37 | 105 |
| 2021 | 225 | 18 | 0 | 0 | 39 | 93 |
| 2022 | 207 | 34 | 2 | 0 | 41 | 119 |
| 2023 | 189 | 44 | 5 | 0 | 42 | 126 |
| 2024 | 220 | 23 | 0 | 0 | 42 | 90 |
| 2025 | 101 | 5 | 0 | 0 | 40 | 67 |
How does Livingston County compare?
How Livingston County compares
Good-day share better than US avg
Livingston County 95.3%
Bell County, Kentucky 63.5%
US average 76.5%
Median AQI worse than US avg
Livingston County 40
Bell County, Kentucky 43
US average 38
Unhealthy days / yr about average
Livingston County 0
Bell County, Kentucky 0
US average 0
Other Counties in Kentucky
Air quality comparison for nearby counties in Kentucky.
Counties with Similar Air Quality
Counties across the US with a similar median AQI to Livingston County.
Amador County, California
AQI 40 · 84.8% good
Anne Arundel County, Maryland
AQI 40 · 87.2% good
Arlington County, Virginia
AQI 40 · 84.8% good
Bergen County, New Jersey
AQI 40 · 71.1% good
Berkeley County, West Virginia
AQI 40 · 81.1% good
Billings County, North Dakota
AQI 40 · 80.3% good
What Livingston 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 40 means for exposure. Health guidance
- See how Livingston County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Livingston County with its Kentucky neighbours before drawing a conclusion about the region. All of Kentucky
Based on 106 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 Livingston County, Kentucky? ▼
Livingston County has a median Air Quality Index (AQI) of 40, rated "Good." 95.3% of monitored days (101 out of 106) had good air quality in 2025.
What is the main pollutant in Livingston County? ▼
The primary pollutant in Livingston County is Ozone (O3), which was the main AQI driver on 106 days (100% of monitored days). Can trigger asthma, reduce lung function, and cause chest pain.
How many unhealthy air days does Livingston County have? ▼
In 2025, Livingston County recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 67.
Is the air quality in Livingston County getting better or worse? ▼
Air quality in Livingston County is stable based on 5-year trends (2020-2025). Best year: 2020 with 235 good days. Worst year: 2025 with 101 good days.
What does AQI 40 mean for health? ▼
Livingston County's median AQI of 40 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 Livingston County compare to other counties in Kentucky? ▼
Livingston County has 95.3% good air days. Nearby counties in Kentucky: Bell (63.5% good), Boone (95.1% good), Boyd (82.8% good), Bullitt (92.7% good), Campbell (78.5% good), Carter (89.8% good).
What is the 90th percentile AQI in Livingston County? ▼
The 90th percentile AQI for Livingston County is 49, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 67 (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.