Chase, Kansas Air Quality
Chase County, Kansas (KS)
→ Stableover 10 years
How Chase, Kansas Air Quality Compares
Chase, Kansas's median AQI of 29is 29% better than the national average of 41. Air quality has improved by 4 AQI points over the past decade. The area rarely experiences unhealthy air quality days. The primary pollutant of concern is Fine Particulate Matter (PM2.5).
Chase, Kansas Air Quality: The Full Picture
Chase, Kansas (Chase County) holds an AirHistory Air Quality Grade of B (good, scoring 73 out of 100), built from 10 years of EPA Air Quality System monitoring. Its median AQI fell 4 points between 2014 (33) and 2023 (29), and the five-year median now sits at 26 — inside the "Good" band on the EPA scale.
The pollutant driving most of the area's AQI readings is Fine Particulate Matter (PM2.5). In 2023, it set the daily AQI on 117 of 117 monitored days (100% of the year), making it the controlling pollutant for the B grade. The single worst reading logged that year hit an AQI of 79 (Moderate), while the 90th-percentile day — the level the dirtiest 10% of days reach — came in at 54.
In 2023, Chase County recorded 98 "Good" air days (84% of the 117 days with valid AQI data), 19 "Moderate" days, and 0 days at "Unhealthy for Sensitive Groups" or above. Over the most recent five years on record, monitors logged 1 days that crossed into "Unhealthy for Sensitive Groups" or worse — about 0 per year.
The decade-long trend is essentially flat, with year-to-year median AQI shifting by less than 0.26 points per year on average. The cleanest year in the record was 2016 (median AQI 24), and the most polluted was 2014 (median AQI 33). Because the data come straight from federally certified EPA monitors, these figures track the Kansas county the monitors physically sit in rather than a city boundary.
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10-Year AQI Trend
The solid line shows the median AQI each year. The dashed line shows the 90th percentile (worst 10% of days).
Air Quality Day Breakdown
Number of days per year in each EPA AQI category. Green = Good (AQI 0-50), Yellow = Moderate (51-100), Orange = Unhealthy for Sensitive Groups (101-150), Red = Unhealthy or worse (151+).
Year-by-Year Data
| Year | Median AQI | 90th Pct | Max AQI | Good Days | Moderate | Unhealthy+ | Pollutant |
|---|---|---|---|---|---|---|---|
| 2023 | 29 | 54 | 79 | 98 | 19 | 0 | PM2.5 |
| 2022 | 25 | 49 | 66 | 110 | 11 | 0 | PM2.5 |
| 2021 | 27 | 52 | 99 | 102 | 18 | 0 | PM2.5 |
| 2020 | 24 | 47 | 63 | 110 | 11 | 0 | PM2.5 |
| 2019 | 27 | 51 | 113 | 105 | 12 | 1 | PM2.5 |
| 2018 | 30 | 53 | 67 | 96 | 20 | 0 | PM2.5 |
| 2017 | 28 | 52 | 65 | 100 | 18 | 0 | PM2.5 |
| 2016 | 24 | 52 | 148 | 105 | 11 | 2 | PM2.5 |
| 2015 | 26 | 55 | 85 | 97 | 22 | 0 | PM2.5 |
| 2014 | 33 | 58 | 154 | 84 | 35 | 1 | PM2.5 |
What This Means for Chase County Residents
Chase, Kansas has received an Air Quality Grade of B (73/100) based on a decade of monitoring data from the EPA's air quality monitoring program. The current median AQI of 29 falls in the "Good" range.
The primary pollutant affecting this area is Fine Particulate Matter (PM2.5). Over the past 5 years, this area has averaged 0 unhealthy air quality days per year, days when sensitive groups (children, elderly, those with respiratory conditions) should limit outdoor activity. The American Lung Association's State of the Air report provides additional context on long-term health risks from air pollution exposure.
Related Cities in Kansas
Frequently Asked Questions
Chase, Kansas has a current median AQI of 29, which falls in the "Good" range. The area has received an Air Quality Grade of B (73/100) based on 10 years of EPA monitoring data.
Air quality in Chase, Kansas is stable over the past decade. The median AQI has changed by -4 points from 2014 to 2023.
Chase, Kansas averages 0 unhealthy air quality days per year over the past 5 years. On these days, sensitive groups including children, the elderly, and those with respiratory conditions should limit outdoor activity.
The primary pollutant affecting Chase, Kansas is Fine Particulate Matter (PM2.5). This is the dominant contributor to elevated AQI readings in the Chase County area.
Chase, Kansas averages 0 unhealthy air days per year. This is relatively low, making it a reasonable choice for asthma sufferers. The primary pollutant is Fine Particulate Matter (PM2.5), which is a known asthma trigger.
With a median AQI of 29 (Good), outdoor exercise in Chase, Kansas is generally safe year-round. Chase, Kansas averages 0 days per year when athletes should move workouts indoors.