Air quality · Kansas
Air quality in Kansas
Across the 3 Kansas ZIPs with EPA county air-quality data, the median day is Good in all 3 (median AQI 44–48). 5 days across those counties reached Unhealthy or worse in 2025. This is a 2025 county annual summary, not a live reading.
Last verified 2026-09-24 · methodology
Air quality by ZIP code in Kansas
EPA's 2025 annual summary for each ZIP's county. Median AQI is the typical day; lower is cleaner.
| ZIP | Median AQI | Good days | Unhealthy or worse |
|---|---|---|---|
| 66603TopekaShawnee County | 44 Good | 234 of 365 | 2 |
| 67214Wichita (KS)Sedgwick County | 48 Good | 210 of 365 | 1 |
| 66062Olathe (KS)Johnson County | 44 Good | 250 of 365 | 2 |
County-level figures from EPA Air Quality System (AQS), annual county summary, joined to each ZIP by county. None of them is a measurement at a specific address.
What lands here
Pages show the 2025 median AQI category (Good, Moderate, Unhealthy for Sensitive Groups, Unhealthy, Very Unhealthy, Hazardous) for the ZIP's county, plus the year's max/90th-percentile AQI and day-count breakdown by category.
Source & refresh
EPA Air Quality System (AQS), annual county summary. Refreshed annual (epa aqs publication). Primary source →
Kansas top concern
Radon, tornadoes, Ogallala aquifer
Kansas has Zone 1 radon coverage statewide and sits in central Tornado Alley. Western KS water systems draw from the depleting Ogallala aquifer; EPA SDWIS shows arsenic + nitrate compliance pressure in some rural systems.
See Kansas state page for the full state-level rollup across all 12 dimensions.
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Plain-English guide to the EPA Air Quality Index (AQI) and the 6 categories from Good to Hazardous. When to take precautions and which pollutants matter.
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