SmogRank / World / North America / United States / Arkansas
Most polluted cities in Arkansas, United States
4 measured cities, last 30 days; 0 above the WHO 24-hour guideline. Worst: Little Rock at 11.4 µg/m³, #505 in the world.
Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.
- 1Little Rock 0%
- 2Marionlast full day 2 Oct 0%
- 3Springdale 0%
- 4Fort Smith 0%
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
Estimated: cities without a monitor
Arkansas cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.
| City | 7-day estimate |
|---|---|
| Fayetteville | ≈ 6 µg/m³ |
| Jonesboro | ≈ 8 µg/m³ |
| North Little Rock | ≈ 8 µg/m³ |
| Conway | ≈ 7 µg/m³ |
| Rogers | ≈ 6 µg/m³ |
| Pine Bluff | ≈ 8 µg/m³ |
| Bentonville | ≈ 6 µg/m³ |
| Hot Springs | ≈ 7 µg/m³ |
| Benton | ≈ 8 µg/m³ |
| Sherwood | ≈ 8 µg/m³ |
| Texarkana | ≈ 7 µg/m³ |
| Russellville | ≈ 6 µg/m³ |
| Jacksonville | ≈ 8 µg/m³ |
| Bella Vista | ≈ 6 µg/m³ |
| Paragould | ≈ 7 µg/m³ |
| Cabot | ≈ 8 µg/m³ |
| West Memphis | ≈ 7 µg/m³ |
| Searcy | ≈ 7 µg/m³ |
| Van Buren | ≈ 6 µg/m³ |
| Bryant | ≈ 8 µg/m³ |
| El Dorado | ≈ 7 µg/m³ |
| Maumelle | ≈ 8 µg/m³ |
| Siloam Springs | ≈ 7 µg/m³ |
Bad-air episodes in Arkansas
- Central United States, January 202628 to 29 January 2026, 2 days10 cities37 µg/m³peak, Moore
- North-eastern United States, July 20254 to 5 July 2025, 2 days68 cities74 µg/m³peak, Lincolnwood
- United States and Mexico, March 202514 to 15 March 2025, 2 days42 cities78 µg/m³peak, Chanute
- Eastern United States, March 202515 March 2025, 1 day68 cities70 µg/m³peak, East Saint Louis
- Southern and eastern United States and Mexico, July and August 202431 July to 2 August 2024, 3 days71 cities47 µg/m³peak, Marion
- Southern United States and Mexico, 19 to 28 May 202410 days44 cities75 µg/m³peak, Port Isabel
Times when many cities around here had PM2.5 at twice their usual or more on the same days.
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SmogRank, most polluted cities in Arkansas, United States, PM2.5, last 30 days to 6 Oct 2026, 22:00 UTC, smogrank.com/us/region/arkansas?w=30d.
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.
Updated 2026-10-06 22:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.