Median AQI
48
Good
Kansas · County air quality · 2025
Sedgwick County, Kansas
Median AQI 48 (Good). 58.6% of monitored days rated Good, direct from EPA Air Quality System stations.
- 48
- Median AQI
- 58.6%
- Good-air days
- 1
- Unhealthy days
- 12%
- Cleaner than US counties
The verdict
According to EPA Air Quality System monitoring data, Sedgwick County's air is good on balance, among the more polluted 10% of US counties, a median AQI of 48 with 58.6% of 181 monitored days in the Good band, driven mainly by PM2.5.
- 48
- median AQI · Good
- 58.6%
- days rated Good
- PM2.5
- main pollutant
- 12%
- cleaner than US counties
1 day reached Unhealthy or worse; the worst single reading hit AQI 192.
Data updated July 2026
- Good · 106 d · 58.6%
- Moderate · 74 d · 40.9%
- Unhealthy · 1 d · 0.6%
How did Sedgwick County's air break down in 2025?
Across 181 monitored days, 106 fell in the Good band (AQI 0–50) and 1 reached Unhealthy or worse. The worst single day peaked at AQI 192 (Unhealthy).
EPA AQS →Air quality data from EPA Air Quality System (2025). 181 days monitored. Median AQI: 48 (Good).
Insights: Sedgwick County, Kansas. EPA monitors recorded a median Air Quality Index of 48 across 181 measured days in 2025, earning a Good classification and a Moderate health grade. Of those days, 106 (59%) fell in the Good band (AQI 0–50), 74 (41%) registered Moderate readings, and 0 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 64, while the worst single-day peak hit 192 (Unhealthy). Residents averaged about 17.6 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as PM2.5 (89 days), Ozone (88 days), PM10 (4 days). Across the 2020–2025 trend window, good days shifted by -190 and the median AQI moved +8 points, placing the multi-year trajectory at worsening. 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
58.6%
106 of 181 monitored days
-16.4pp vs 75% target
Max AQI Recorded
192
Unhealthy
Health Grade
Moderate
90th-pct AQI 64
Sedgwick County, Good days share 58.6%
National avg
Share of monitored days at AQI 0-50 (Good band).
Sedgwick 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 181 monitored days across EPA AQI categories.
Good
106
59%
Moderate
74
41%
USG
0
0%
Unhealthy
1
1%
Very Unhealthy
0
0%
Hazardous
0
0%
Pollutant Breakdown
Days where each pollutant was the primary driver of AQI readings in Sedgwick County.
- PM2.5 · 89 days · 49.2%
- Ozone · 88 days · 48.6%
- PM10 · 4 days · 2.2%
Health Impact Assessment
Moderate
Sedgwick County's air quality is rated Moderate based on 58.6% good air days. There were 1 unhealthy days in 2025 when outdoor activity should be limited.
Air quality is acceptable most days, but 0 days reached "Unhealthy for Sensitive Groups" (AQI 101-150) and peak AQI reached 192. Sensitive groups should monitor real-time conditions at AirNow.gov.
The dominant pollutant is PM2.5, driving AQI on 89 of 181 monitored days.
5-Year Air Quality Trend
Air quality is worsening in Sedgwick County. Best year: 2020 (296 good days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 296 | 67 | 3 | 0 | 40 | 114 |
| 2021 | 224 | 136 | 5 | 0 | 46 | 141 |
| 2022 | 183 | 178 | 4 | 0 | 50 | 119 |
| 2023 | 207 | 153 | 4 | 1 | 48 | 157 |
| 2024 | 275 | 88 | 2 | 1 | 43 | 180 |
| 2025 | 106 | 74 | 0 | 1 | 48 | 192 |
How does Sedgwick County compare?
How Sedgwick County compares
Good-day share worse than US avg
Sedgwick County 58.6%
Chase County, Kansas 88.9%
US average 76.5%
Median AQI worse than US avg
Sedgwick County 48
Chase County, Kansas 22
US average 38
Unhealthy days / yr worse than US avg
Sedgwick 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 Sedgwick County.
Black Hawk County, Iowa
AQI 48 · 56.6% good
Box Elder County, Utah
AQI 48 · 60.0% good
Brookings County, South Dakota
AQI 48 · 53.0% good
Clear Creek County, Colorado
AQI 48 · 64.4% good
Coconino County, Arizona
AQI 48 · 62.5% good
Columbia County, Florida
AQI 48 · 56.4% good
What Sedgwick 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 48 means for exposure. Health guidance
- See how Sedgwick County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Sedgwick County with its Kansas neighbours before drawing a conclusion about the region. All of Kansas
Based on 181 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 Sedgwick County, Kansas? ▼
Sedgwick County has a median Air Quality Index (AQI) of 48, rated "Good." 58.6% of monitored days (106 out of 181) had good air quality in 2025.
What is the main pollutant in Sedgwick County? ▼
The primary pollutant in Sedgwick County is Fine Particles (PM2.5), which was the main AQI driver on 89 days (49% of monitored days). Penetrates deep into lungs and bloodstream. Linked to heart disease and premature death.
How many unhealthy air days does Sedgwick County have? ▼
In 2025, Sedgwick County recorded 1 unhealthy air days (1 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 192.
Is the air quality in Sedgwick County getting better or worse? ▼
Air quality in Sedgwick County is worsening based on 5-year trends (2020-2025). Best year: 2020 with 296 good days. Worst year: 2025 with 106 good days.
What does AQI 48 mean for health? ▼
Sedgwick County's median AQI of 48 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 Sedgwick County compare to other counties in Kansas? ▼
Sedgwick County has 58.6% 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 Sedgwick County? ▼
The 90th percentile AQI for Sedgwick County is 64, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 192 (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.