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, #1,528 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×▼304
  2. 2Phoenix 11.6×▼257
  3. 3Casa Grande 11.4×▼276
  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×▼289
  11. 11Apache Junction 11.0×▼285
  12. 12Marana 10.9×▼290
  13. 13Green Valley 10.6×▼289
Low risk1–3
Moderate risk4–6
High risk7–10
Very high risk10+

Canada's AQHI+ for PM2.5 (1 point per 10 µg/m³), which is defined on hourly values. 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 risk
Gilbert≈ 4 µg/m³Low risk
Scottsdale≈ 7 µg/m³Low risk
Peoria≈ 6 µg/m³Low risk
Tempe Junction≈ 7 µg/m³Low risk
Surprise≈ 6 µg/m³Low risk
San Tan Valley≈ 4 µg/m³Low risk
Avondale≈ 6 µg/m³Low risk
Goodyear≈ 6 µg/m³Low risk
Lake Havasu City≈ 2 µg/m³Low risk
Buckeye≈ 5 µg/m³Low risk
Catalina Foothills≈ 3 µg/m³Low risk
Maricopa≈ 7 µg/m³Low risk
Sierra Vista≈ 2 µg/m³Low risk
Prescott Valley≈ 3 µg/m³Low risk
Bullhead City≈ 2 µg/m³Low risk
Sun City≈ 6 µg/m³Low risk
Queen Creek≈ 4 µg/m³Low risk
El Mirage≈ 6 µg/m³Low risk
San Luis≈ 6 µg/m³Low risk
Florence≈ 2 µg/m³Low risk
Kingman≈ 2 µg/m³Low risk
Drexel Heights≈ 2 µg/m³Low risk
Fortuna Foothills≈ 4 µg/m³Low risk
Sahuarita≈ 3 µg/m³Low risk
Sun City West≈ 6 µg/m³Low risk
Fountain Hills≈ 4 µg/m³Low risk
Rio Rico≈ 2 µg/m³Low risk
Eloy≈ 3 µg/m³Low risk
Tanque Verde≈ 3 µg/m³Low risk
Flowing Wells≈ 3 µg/m³Low risk
Somerton≈ 6 µg/m³Low risk

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SmogRank, most polluted cities in Arizona, United States, PM2.5, this year to 2 Oct 2026, 04:00 UTC, smogrank.com/us/region/arizona?w=year.

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Updated 2026-10-02 04:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the Canada AQHI+ PM2.5 sub-index.