Median AQI
43
Good
Missouri · County air quality · 2025
Jackson County, Missouri
Median AQI 43 (Good). 60.3% of monitored days rated Good, direct from EPA Air Quality System stations.
- 43
- Median AQI
- 60.3%
- Good-air days
- 1
- Unhealthy days
- 15%
- Cleaner than US counties
The verdict
According to EPA Air Quality System monitoring data, Jackson County's air is good on balance, among the more polluted 10% of US counties, a median AQI of 43 with 60.3% of 151 monitored days in the Good band, driven mainly by PM2.5.
- 43
- median AQI · Good
- 60.3%
- days rated Good
- PM2.5
- main pollutant
- 15%
- cleaner than US counties
1 day reached Unhealthy or worse; the worst single reading hit AQI 293.
Data updated July 2026
- Good · 91 d · 60.3%
- Moderate · 59 d · 39.1%
- Very Unhealthy · 1 d · 0.7%
How did Jackson County's air break down in 2025?
Across 151 monitored days, 91 fell in the Good band (AQI 0–50) and 1 reached Unhealthy or worse. The worst single day peaked at AQI 293 (Very Unhealthy).
EPA AQS →Air quality data from EPA Air Quality System (2025). 151 days monitored. Median AQI: 43 (Good).
Insights: Jackson County, Missouri. EPA monitors recorded a median Air Quality Index of 43 across 151 measured days in 2025, earning a Good classification and a Moderate health grade. Of those days, 91 (60%) fell in the Good band (AQI 0–50), 59 (39%) registered Moderate readings, and 0 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 61, while the worst single-day peak hit 293 (Very Unhealthy). Residents averaged about 18.1 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as PM2.5 (96 days), PM10 (29 days), NO2 (23 days), CO (3 days). Across the 2020–2025 trend window, good days shifted by -84 and the median AQI moved -8 points, placing the multi-year trajectory at improving. Residents and visitors experienced 1 unhealthy-or-worse days combined, periods when the EPA recommends sensitive groups limit prolonged outdoor exertion. Nearby counties show comparable readings: Andrew (84.3% good, AQI 42); Boone (89.1% good, AQI 41); Buchanan (64.2% good, AQI 39); Callaway (85.6% good, AQI 42); Cass (82.2% good, AQI 41); Cedar (81.8% good, AQI 40).
Air Quality Summary
Good Days
60.3%
91 of 151 monitored days
-14.7pp vs 75% target
Max AQI Recorded
293
Very Unhealthy
Health Grade
Moderate
90th-pct AQI 61
Jackson County, Good days share 60.3%
National avg
Share of monitored days at AQI 0-50 (Good band).
Jackson County, Unhealthy-or-worse share 0.7%
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 151 monitored days across EPA AQI categories.
Good
91
60%
Moderate
59
39%
USG
0
0%
Unhealthy
0
0%
Very Unhealthy
1
1%
Hazardous
0
0%
Pollutant Breakdown
Days where each pollutant was the primary driver of AQI readings in Jackson County.
- PM2.5 · 96 days · 63.6%
- PM10 · 29 days · 19.2%
- NO₂ · 23 days · 15.2%
- CO · 3 days · 2.0%
Health Impact Assessment
Moderate
Jackson County's air quality is rated Moderate based on 60.3% good air days. There were 1 unhealthy days in 2025 when outdoor activity should be limited.
Air quality reached unhealthy levels on 1 days in 2025 (0 Unhealthy, 1 Very Unhealthy). Sensitive groups, including people with asthma, COPD, cardiovascular conditions, children, and adults over 65, should review the daily breakdown below and follow local air-quality advisories on high-AQI days.
Sensitive group advisory
People with asthma, COPD, heart disease, children, pregnant women, and adults 65+ should follow EPA AQI alerts daily and limit outdoor exertion when AQI exceeds 100. Real-time conditions: airnow.gov.
The dominant pollutant is PM2.5, driving AQI on 96 of 151 monitored days.
5-Year Air Quality Trend
Air quality is improving in Jackson County. Best year: 2024 (213 good days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 175 | 188 | 2 | 1 | 51 | 159 |
| 2021 | 132 | 228 | 5 | 0 | 53 | 147 |
| 2022 | 160 | 205 | 0 | 0 | 52 | 93 |
| 2023 | 171 | 192 | 1 | 1 | 52 | 155 |
| 2024 | 213 | 145 | 1 | 0 | 46 | 109 |
| 2025 | 91 | 59 | 0 | 0 | 43 | 293 |
How does Jackson County compare?
How Jackson County compares
Good-day share worse than US avg
Jackson County 60.3%
Andrew County, Missouri 84.3%
US average 76.5%
Median AQI worse than US avg
Jackson County 43
Andrew County, Missouri 42
US average 38
Unhealthy days / yr worse than US avg
Jackson County 1
Andrew County, Missouri 0
US average 0
Other Counties in Missouri
Air quality comparison for nearby counties in Missouri.
Counties with Similar Air Quality
Counties across the US with a similar median AQI to Jackson County.
Allegan County, Michigan
AQI 43 · 71.2% good
Allen County, Ohio
AQI 43 · 65.9% good
Ashtabula County, Ohio
AQI 43 · 81.2% good
Bell County, Kentucky
AQI 43 · 63.5% good
Boise County, Idaho
AQI 43 · 72.9% good
Brazos County, Texas
AQI 43 · 63.4% good
What Jackson County's air means for you
On most days the air here is fine, but PM2.5 drives 1 unhealthy-or-worse day a year that sensitive groups should plan around.
- Sensitive groups (asthma, heart conditions, children, older adults) should check the AQI on high-PM2.5 days, the guide explains what a median of 43 means for exposure. Health guidance
- See how Jackson County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Jackson County with its Missouri neighbours before drawing a conclusion about the region. All of Missouri
Based on 151 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 Jackson County, Missouri? ▼
Jackson County has a median Air Quality Index (AQI) of 43, rated "Good." 60.3% of monitored days (91 out of 151) had good air quality in 2025.
What is the main pollutant in Jackson County? ▼
The primary pollutant in Jackson County is Fine Particles (PM2.5), which was the main AQI driver on 96 days (64% of monitored days). Penetrates deep into lungs and bloodstream. Linked to heart disease and premature death.
How many unhealthy air days does Jackson County have? ▼
In 2025, Jackson County recorded 1 unhealthy air days (0 Unhealthy, 1 Very Unhealthy, 0 Hazardous). The maximum AQI reached 293.
Is the air quality in Jackson County getting better or worse? ▼
Air quality in Jackson County is improving based on 5-year trends (2020-2025). Best year: 2024 with 213 good days. Worst year: 2025 with 91 good days.
What does AQI 43 mean for health? ▼
Jackson County's median AQI of 43 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 Jackson County compare to other counties in Missouri? ▼
Jackson County has 60.3% good air days. Nearby counties in Missouri: Andrew (84.3% good), Boone (89.1% good), Buchanan (64.2% good), Callaway (85.6% good), Cass (82.2% good), Cedar (81.8% good).
What is the 90th percentile AQI in Jackson County? ▼
The 90th percentile AQI for Jackson County is 61, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 293 (Very Unhealthy).
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.