Median AQI
44
Good
Kansas · County air quality · 2025
Wyandotte County, Kansas
Median AQI 44 (Good). 63.1% of monitored days rated Good, direct from EPA Air Quality System stations.
- 44
- Median AQI
- 63.1%
- Good-air days
- 1
- Unhealthy days
- 20%
- Cleaner than US counties
The verdict
According to EPA Air Quality System monitoring data, Wyandotte County's air is good on balance, among the more polluted 10% of US counties, a median AQI of 44 with 63.1% of 168 monitored days in the Good band, driven mainly by Ozone.
- 44
- median AQI · Good
- 63.1%
- days rated Good
- Ozone
- main pollutant
- 20%
- cleaner than US counties
1 day reached Unhealthy or worse; the worst single reading hit AQI 240.
Data updated July 2026
- Good · 106 d · 63.1%
- Moderate · 59 d · 35.1%
- USG · 2 d · 1.2%
- Very Unhealthy · 1 d · 0.6%
How did Wyandotte County's air break down in 2025?
Across 168 monitored days, 106 fell in the Good band (AQI 0–50) and 1 reached Unhealthy or worse. The worst single day peaked at AQI 240 (Very Unhealthy).
EPA AQS →Air quality data from EPA Air Quality System (2025). 168 days monitored. Median AQI: 44 (Good).
Insights: Wyandotte County, Kansas. EPA monitors recorded a median Air Quality Index of 44 across 168 measured days in 2025, earning a Good classification and a Moderate health grade. Of those days, 106 (63%) fell in the Good band (AQI 0–50), 59 (35%) registered Moderate readings, and 2 (1%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 67, while the worst single-day peak hit 240 (Very Unhealthy). Residents averaged about 18.9 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as Ozone (83 days), PM2.5 (73 days), PM10 (6 days), NO2 (6 days). Across the 2020–2025 trend window, good days shifted by -40 and the median AQI moved -9 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: Chase (88.9% good, AQI 22); Douglas (90.7% good, AQI 41); Ford (89.4% good, AQI 26); Johnson (71.8% good, AQI 43); Leavenworth (93.9% good, AQI 36); Neosho (73.5% good, AQI 43).
Air Quality Summary
Good Days
63.1%
106 of 168 monitored days
-11.9pp vs 75% target
Max AQI Recorded
240
Very Unhealthy
Health Grade
Moderate
90th-pct AQI 67
Wyandotte County, Good days share 63.1%
National avg
Share of monitored days at AQI 0-50 (Good band).
Wyandotte County, Unhealthy-or-worse share 0.6%
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 168 monitored days across EPA AQI categories.
Good
106
63%
Moderate
59
35%
USG
2
1%
Unhealthy
0
0%
Very Unhealthy
1
1%
Hazardous
0
0%
Pollutant Breakdown
Days where each pollutant was the primary driver of AQI readings in Wyandotte County.
- Ozone · 83 days · 49.4%
- PM2.5 · 73 days · 43.5%
- PM10 · 6 days · 3.6%
- NO₂ · 6 days · 3.6%
Health Impact Assessment
Moderate
Wyandotte County's air quality is rated Moderate based on 63.1% 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 Ozone, driving AQI on 83 of 168 monitored days.
5-Year Air Quality Trend
Air quality is improving in Wyandotte County. Best year: 2024 (214 good days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 146 | 215 | 5 | 0 | 53 | 116 |
| 2021 | 154 | 204 | 7 | 0 | 53 | 145 |
| 2022 | 179 | 184 | 2 | 0 | 51 | 112 |
| 2023 | 174 | 174 | 15 | 2 | 51 | 166 |
| 2024 | 214 | 148 | 3 | 0 | 46 | 126 |
| 2025 | 106 | 59 | 2 | 0 | 44 | 240 |
How does Wyandotte County compare?
How Wyandotte County compares
Good-day share worse than US avg
Wyandotte County 63.1%
Chase County, Kansas 88.9%
US average 76.5%
Median AQI worse than US avg
Wyandotte County 44
Chase County, Kansas 22
US average 38
Unhealthy days / yr worse than US avg
Wyandotte County 1
Chase County, Kansas 0
US average 0
Other Counties in Kansas
Air quality comparison for nearby counties in Kansas.
Counties with Similar Air Quality
Counties across the US with a similar median AQI to Wyandotte County.
Baltimore County, Maryland
AQI 44 · 70.4% good
Baltimore (City) County, Maryland
AQI 44 · 68.7% good
Bartholomew County, Indiana
AQI 44 · 69.2% good
Berks County, Pennsylvania
AQI 44 · 65.6% good
Bolivar County, Mississippi
AQI 44 · 70.3% good
Brewster County, Texas
AQI 44 · 69.0% good
What Wyandotte County's air means for you
On most days the air here is fine, but Ozone 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-Ozone days, the guide explains what a median of 44 means for exposure. Health guidance
- See how Wyandotte County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Wyandotte County with its Kansas neighbours before drawing a conclusion about the region. All of Kansas
Based on 168 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 Wyandotte County, Kansas? ▼
Wyandotte County has a median Air Quality Index (AQI) of 44, rated "Good." 63.1% of monitored days (106 out of 168) had good air quality in 2025.
What is the main pollutant in Wyandotte County? ▼
The primary pollutant in Wyandotte County is Ozone (O3), which was the main AQI driver on 83 days (49% of monitored days). Can trigger asthma, reduce lung function, and cause chest pain.
How many unhealthy air days does Wyandotte County have? ▼
In 2025, Wyandotte County recorded 1 unhealthy air days (0 Unhealthy, 1 Very Unhealthy, 0 Hazardous). The maximum AQI reached 240.
Is the air quality in Wyandotte County getting better or worse? ▼
Air quality in Wyandotte County is improving based on 5-year trends (2020-2025). Best year: 2024 with 214 good days. Worst year: 2025 with 106 good days.
What does AQI 44 mean for health? ▼
Wyandotte County's median AQI of 44 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 Wyandotte County compare to other counties in Kansas? ▼
Wyandotte County has 63.1% good air days. Nearby counties in Kansas: Chase (88.9% good), Douglas (90.7% good), Ford (89.4% good), Johnson (71.8% good), Leavenworth (93.9% good), Neosho (73.5% good).
What is the 90th percentile AQI in Wyandotte County? ▼
The 90th percentile AQI for Wyandotte County is 67, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 240 (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.