SmogRank / World / North America / United States / Arizona

Most polluted cities in Arizona, United States

13 measured cities, this year; 10 above the WHO annual guideline. Worst: Nogales at 8.4 µg/m³, #1,529 in the world.

Arizona: 14 measured citiesCalifornia: 103 measured citiesNew Mexico: 6 measured citiesUtah: 15 measured citiesNevada: 10 measured citiesColorado: 18 measured cities#13 Green Valley: 3.2 µg/m³#12 Marana: 4.6 µg/m³#11 Apache Junction: 4.8 µg/m³#10 Casas Adobes: 5.5 µg/m³#9 Mesa: 6.1 µg/m³#8 Glendale: 6.3 µg/m³#7 Tucson: 6.5 µg/m³#6 Tempe: 6.6 µg/m³#4 Payson: 6.8 µg/m³#5 Yuma: 6.8 µg/m³#3 Casa Grande: 7.2 µg/m³#2 Phoenix: 8.1 µg/m³#1 Nogales: 8.4 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Nogales 8.4 WHO annual guideline
Every measured city in Arizona, United States, one column each, worst on the left and cleanest on the right. Point at it to read a city; tap to open it.
  1. 1Nogales 11.7×▼305
  2. 2Phoenix 11.6×▼256
  3. 3Casa Grande 11.4×▼275
  4. 4Payson 11.4×▼307
  5. 5Yuma 11.4×▼306
  6. 6Tempe 11.3×▼288
  7. 7Tucson 11.3×▼249
  8. 8Glendale 11.3×▼290
  9. 9Mesa 11.2×▼282
  10. 10Casas Adobes 11.1×▼290
  11. 11Apache Junction 11.0×▼286
  12. 12Marana 10.9×▼291
  13. 13Green Valley 10.6×▼291
Low1–3
Moderate4–6
High7–9
Very high10

The UK's Daily Air Quality Index (1 to 10), PM2.5 bands. 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/m³Low
Gilbert≈ 4 µg/m³Low
Scottsdale≈ 7 µg/m³Low
Peoria≈ 6 µg/m³Low
Tempe Junction≈ 7 µg/m³Low
Surprise≈ 6 µg/m³Low
San Tan Valley≈ 4 µg/m³Low
Avondale≈ 6 µg/m³Low
Goodyear≈ 6 µg/m³Low
Lake Havasu City≈ 2 µg/m³Low
Buckeye≈ 5 µg/m³Low
Catalina Foothills≈ 3 µg/m³Low
Maricopa≈ 7 µg/m³Low
Sierra Vista≈ 2 µg/m³Low
Prescott Valley≈ 3 µg/m³Low
Bullhead City≈ 2 µg/m³Low
Sun City≈ 6 µg/m³Low
Queen Creek≈ 4 µg/m³Low
El Mirage≈ 6 µg/m³Low
San Luis≈ 6 µg/m³Low
Florence≈ 2 µg/m³Low
Kingman≈ 2 µg/m³Low
Drexel Heights≈ 2 µg/m³Low
Fortuna Foothills≈ 4 µg/m³Low
Sahuarita≈ 3 µg/m³Low
Sun City West≈ 6 µg/m³Low
Fountain Hills≈ 4 µg/m³Low
Rio Rico≈ 2 µg/m³Low
Eloy≈ 3 µg/m³Low
Tanque Verde≈ 3 µg/m³Low
Flowing Wells≈ 3 µg/m³Low
Somerton≈ 6 µg/m³Low

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SmogRank, most polluted cities in Arizona, United States, PM2.5, this year to 2 Oct 2026, 05:00 UTC, smogrank.com/us/region/arizona?w=year.

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Updated 2026-10-02 05:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the UK DAQI PM2.5 sub-index.