SmogRank / World / North America / United States / Alabama

Most polluted cities in Alabama, United States

9 measured cities, this year; 9 above the WHO annual guideline. Worst: Montgomery at 9.2 µg/m³, #1,251 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.

Louisiana: 9 measured citiesMississippi: 7 measured citiesAlabama: 9 measured citiesFlorida: 36 measured citiesGeorgia: 16 measured citiesNorth Carolina: 18 measured citiesTennessee: 14 measured cities#9 Fairfield: 6.6 µg/m³#8 Fairhope: 6.8 µg/m³#7 Prichard: 7.9 µg/m³#6 Bessemer: 8.1 µg/m³#5 Decatur: 8.3 µg/m³#4 Huntsville: 8.4 µg/m³#3 Gadsden: 8.9 µg/m³#2 Birmingham: 9.0 µg/m³#1 Montgomery: 9.2 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Decatur 0% 0.75%0
Every measured city in Alabama, United States, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.
  1. 1Decatur 0%
  2. 2Montgomery 0%
  3. 3Birmingham 0%
  4. 4Gadsden 0%
  5. 5Huntsville 0%
  6. 6Bessemer 0%
  7. 7Prichardlast full day 3 Oct 0%
  8. 8Fairhopelast full day 3 Oct 0%
  9. 9Fairfield no daily values yet0%
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

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

Alabama 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.

City7-day estimateBand
Mobile≈ 4 µg/m³Good
Tuscaloosa≈ 7 µg/m³Good
Hoover≈ 11 µg/m³Moderate
Dothan≈ 6 µg/m³Good
Auburn≈ 9 µg/m³Good
Madison≈ 6 µg/m³Good
Florence≈ 6 µg/m³Good
East Florence≈ 6 µg/m³Good
Prattville≈ 8 µg/m³Good
Vestavia Hills≈ 11 µg/m³Moderate
Alabaster≈ 9 µg/m³Good
Opelika≈ 6 µg/m³Good
Enterprise≈ 7 µg/m³Good
Homewood≈ 11 µg/m³Moderate
Athens≈ 6 µg/m³Good
Daphne≈ 4 µg/m³Good
Northport≈ 7 µg/m³Good
Dixiana≈ 11 µg/m³Moderate
Pelham≈ 9 µg/m³Good
Anniston≈ 7 µg/m³Good
Albertville≈ 7 µg/m³Good
Oxford≈ 7 µg/m³Good
Trussville≈ 11 µg/m³Moderate
Mountain Brook≈ 11 µg/m³Moderate
Selma≈ 7 µg/m³Good
Troy≈ 6 µg/m³Good
Helena≈ 9 µg/m³Good
Tillmans Corner≈ 3 µg/m³Good
Foley≈ 4 µg/m³Good
Center Point≈ 11 µg/m³Moderate
Hueytown≈ 11 µg/m³Moderate
Talladega≈ 7 µg/m³Good
Cullman≈ 9 µg/m³Good
Millbrook≈ 8 µg/m³Good

Bad-air episodes in Alabama

Times when many cities around here had PM2.5 at twice their usual or more on the same days.

Use this board

SmogRank, most polluted cities in Alabama, United States, PM2.5, this year to 6 Oct 2026, 22:00 UTC, smogrank.com/us/region/alabama?w=year.

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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.