SmogRank / World / North America / United States / Arizona

Most polluted cities in Arizona, United States

7 measured cities, last 24 hours; 0 above the WHO 24-hour guideline. Worst: Phoenix at 5.2 µg/m³, #910 in the world.

Arizona: 7 measured citiesCalifornia: 71 measured citiesNew Mexico: 3 measured citiesUtah: 14 measured citiesNevada: 9 measured citiesColorado: 10 measured cities#7 Green Valley: 3.2 µg/m³#6 Tempe: 3.7 µg/m³#5 Yuma: 3.9 µg/m³#4 Casas Adobes: 4.0 µg/m³#3 Glendale: 4.3 µg/m³#2 Tucson: 4.8 µg/m³#1 Phoenix: 5.2 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Phoenix 5.2 µg/m³ 15 µg/m³ WHO 24-hour guideline0
Every measured city in Arizona, United States, one column each, worst on the left and cleanest on the right; height is PM2.5 in µg/m³. Point at it to read a city; tap to open it.
  1. 1Phoenix 290.3×
  2. 2Tucson 270.3×
  3. 3Glendale 240.3×
  4. 4Casas Adobes 220.3×
  5. 5Yuma 220.3×
  6. 6Tempe 210.2×
  7. 7Green Valley 180.2×
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

Arizona 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
Chandler≈ 7 µg/m³Good
Gilbert≈ 4 µg/m³Good
Scottsdale≈ 7 µg/m³Good
Peoria≈ 6 µg/m³Good
Tempe Junction≈ 7 µg/m³Good
Surprise≈ 6 µg/m³Good
San Tan Valley≈ 4 µg/m³Good
Avondale≈ 6 µg/m³Good
Goodyear≈ 6 µg/m³Good
Lake Havasu City≈ 2 µg/m³Good
Buckeye≈ 5 µg/m³Good
Catalina Foothills≈ 3 µg/m³Good
Maricopa≈ 7 µg/m³Good
Sierra Vista≈ 2 µg/m³Good
Prescott Valley≈ 3 µg/m³Good
Bullhead City≈ 2 µg/m³Good
Sun City≈ 6 µg/m³Good
Queen Creek≈ 4 µg/m³Good
El Mirage≈ 6 µg/m³Good
San Luis≈ 6 µg/m³Good
Florence≈ 2 µg/m³Good
Kingman≈ 2 µg/m³Good
Drexel Heights≈ 2 µg/m³Good
Fortuna Foothills≈ 4 µg/m³Good
Sahuarita≈ 3 µg/m³Good
Sun City West≈ 6 µg/m³Good
Fountain Hills≈ 4 µg/m³Good
Rio Rico≈ 2 µg/m³Good
Eloy≈ 3 µg/m³Good
Tanque Verde≈ 3 µg/m³Good
Flowing Wells≈ 3 µg/m³Good
Somerton≈ 6 µg/m³Good

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SmogRank, most polluted cities in Arizona, United States, PM2.5, last 24 hours to 2 Oct 2026, 06:00 UTC, smogrank.com/us/region/arizona.

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Updated 2026-10-02 06:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.