Air Quality Rankings for Arkansas 2026
Arkansas has 11 cities with EPA air quality data. Clark, Arkansas has the cleanest air with a 5-year average AQI of 33. Pulaski, Arkansas has the highest AQI at 53.
| # | City | 5yr Avg AQI | Current AQI | Worst Pollutant | Trend | Grade |
|---|---|---|---|---|---|---|
| 1 | Clark, Arkansas | 33 | 35 | Ozone | Stable | B |
| 2 | Newton, Arkansas | 37 | 39 | Ozone | Stable | B |
| 3 | Polk, Arkansas | 38 | 40 | Ozone | Stable | B |
| 4 | Arkansas, Arkansas | 40 | 44 | PM2.5 | Improving | B |
| 5 | Jackson, Arkansas | 41 | 44 | PM2.5 | Stable | B |
| 6 | Ashley, Arkansas | 41 | 43 | PM2.5 | Improving | B |
| 7 | Crittenden, Arkansas | 45 | 41 | PM2.5 | Worsening | C |
| 8 | Garland, Arkansas | 45 | 47 | PM2.5 | Stable | B |
| 9 | Washington, Arkansas | 46 | 44 | PM2.5 | Worsening | C |
| 10 | Union, Arkansas | 47 | 51 | PM2.5 | Worsening | C |
| 11 | Pulaski, Arkansas | 53 | 55 | PM2.5 | Stable | C |
Air quality data for Arkansas is sourced from the EPA Air Quality System (AQS), which monitors outdoor air quality at thousands of stations nationwide.
Frequently Asked Questions
Clark, Arkansas has the best air quality in Arkansas with a 5-year average AQI of 33 and a grade of B.
Arkansas has 11 cities with EPA air quality monitoring data in our database, covering multiple years of AQI measurements.
The Air Quality Index (AQI) measures five major pollutants: ground-level ozone, particulate matter (PM2.5 and PM10), carbon monoxide, sulfur dioxide, and nitrogen dioxide. Lower AQI values indicate cleaner air — 0-50 is "Good," while 150+ is "Unhealthy."
Cities ranked by 5-year average AQI (lower is better). Grades factor in average AQI, trend direction, unhealthy days, and dominant pollutant.