Median AQI
35
Good
Kentucky · County air quality · 2025
Morgan County, Kentucky
Median AQI 35 (Good). 96.6% of monitored days rated Good, direct from EPA Air Quality System stations.
- 35
- Median AQI
- 96.6%
- Good-air days
- 0
- Unhealthy days
- 93%
- Cleaner than US counties
The verdict
According to EPA Air Quality System monitoring data, Morgan County's air is good on balance, among the cleanest 10% of US counties, a median AQI of 35 with 96.6% of 237 monitored days in the Good band, driven mainly by Ozone.
- 35
- median AQI · Good
- 96.6%
- days rated Good
- Ozone
- main pollutant
- 93%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 77.
Data updated July 2026
- Good · 229 d · 96.6%
- Moderate · 8 d · 3.4%
How did Morgan County's air break down in 2025?
Across 237 monitored days, 229 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 77 (Moderate).
EPA AQS →Air quality data from EPA Air Quality System (2025). 237 days monitored. Median AQI: 35 (Good).
Insights: Morgan County, Kentucky. EPA monitors recorded a median Air Quality Index of 35 across 237 measured days in 2025, earning a Good classification and a Excellent health grade. Of those days, 229 (97%) fell in the Good band (AQI 0–50), 8 (3%) registered Moderate readings, and 0 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 47, while the worst single-day peak hit 77 (Moderate). Residents averaged about 29.0 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as Ozone (237 days). Across the 2020–2025 trend window, good days shifted by -132 and the median AQI moved +2 points, placing the multi-year trajectory at stable. The worst single reading over the 2020–2025 window was AQI 77, 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
96.6%
229 of 237 monitored days
21.6pp vs 75% target
Max AQI Recorded
77
Moderate
Health Grade
Excellent
90th-pct AQI 47
Morgan County, Good days share 96.6%
National avg
Share of monitored days at AQI 0-50 (Good band).
Morgan 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 237 monitored days across EPA AQI categories.
Good
229
97%
Moderate
8
3%
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 Morgan County.
- Ozone · 237 days · 100.0%
Health Impact Assessment
Excellent
Morgan County's air quality is rated Excellent based on 96.6% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 96.6% of monitored days in 2025, with a median AQI of 35. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is Ozone, driving AQI on 237 of 237 monitored days.
5-Year Air Quality Trend
Air quality is stable in Morgan County. Best year: 2020 (361 good days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 361 | 4 | 0 | 0 | 33 | 64 |
| 2021 | 338 | 14 | 0 | 0 | 35 | 71 |
| 2022 | 347 | 17 | 0 | 0 | 35 | 74 |
| 2023 | 341 | 23 | 0 | 0 | 38 | 93 |
| 2024 | 334 | 25 | 0 | 0 | 38 | 64 |
| 2025 | 229 | 8 | 0 | 0 | 35 | 77 |
How does Morgan County compare?
How Morgan County compares
Good-day share better than US avg
Morgan County 96.6%
Bell County, Kentucky 63.5%
US average 76.5%
Median AQI better than US avg
Morgan County 35
Bell County, Kentucky 43
US average 38
Unhealthy days / yr about average
Morgan 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 Morgan County.
Androscoggin County, Maine
AQI 35 · 85.5% good
Asotin County, Washington
AQI 35 · 73.8% good
Benton County, Washington
AQI 35 · 88.9% good
Benzie County, Michigan
AQI 35 · 91.1% good
Brooke County, West Virginia
AQI 35 · 79.3% good
Bucks County, Pennsylvania
AQI 35 · 87.5% good
What Morgan 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 35 means for exposure. Health guidance
- See how Morgan County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Morgan County with its Kentucky neighbours before drawing a conclusion about the region. All of Kentucky
Based on 237 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 Morgan County, Kentucky? ▼
Morgan County has a median Air Quality Index (AQI) of 35, rated "Good." 96.6% of monitored days (229 out of 237) had good air quality in 2025.
What is the main pollutant in Morgan County? ▼
The primary pollutant in Morgan County is Ozone (O3), which was the main AQI driver on 237 days (100% of monitored days). Can trigger asthma, reduce lung function, and cause chest pain.
How many unhealthy air days does Morgan County have? ▼
In 2025, Morgan County recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 77.
Is the air quality in Morgan County getting better or worse? ▼
Air quality in Morgan County is stable based on 5-year trends (2020-2025). Best year: 2020 with 361 good days. Worst year: 2025 with 229 good days.
What does AQI 35 mean for health? ▼
Morgan County's median AQI of 35 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 Morgan County compare to other counties in Kentucky? ▼
Morgan County has 96.6% 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 Morgan County? ▼
The 90th percentile AQI for Morgan County is 47, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 77 (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.