# Counties in Arkansas by share of days with good air quality (US EPA AQI), 2003

All 21 values come from U.S. Environmental Protection Agency for 2003, so the places are comparable. 5 counties have no value for that period and are not ranked.

- Indicator id: `aqi_good_days_share`
- Unit: %
- Definition: Days with a daily Air Quality Index of 0 to 50 (good) as a percentage of the days of the year with an AQI in a US county. Calculated by Invokely from the day counts in the EPA AirData annual summaries; both counts are stored with each value.
- Source: U.S. Environmental Protection Agency, EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts (https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual)
- Retrieved: 2026-10-12
- Citation: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Retrieved 2026-10-12.
- Web page: https://invokely.ai/rankings/good-air-quality-days-share/arkansas-counties

| Rank | Place | % |
|---:|---|---:|
| 1 | Montgomery County | 93.4 |
| 2 | Clark County | 85.8 |
| 3 | Newton County | 69.1 |
| 4 | Crittenden County | 65 |
| 5 | Marion County | 55 |
| 6 | Washington County | 46 |
| 7 | Polk County | 39.7 |
| 8 | Mississippi County | 36.9 |
| 9 | Union County | 36.3 |
| 10 | White County | 36 |
| 11 | Arkansas County | 35.1 |
| 11 | Garland County | 35.1 |
| 13 | Phillips County | 34.5 |
| 14 | Miller County | 33.3 |
| 14 | Pope County | 33.3 |
| 16 | Sebastian County | 32.1 |
| 17 | Jefferson County | 31.6 |
| 18 | Craighead County | 31 |
| 19 | Ashley County | 30.8 |
| 20 | Faulkner County | 29.1 |
| 21 | Pulaski County | 18.6 |