Air quality in United States

Air quality in Arizona today

Updated Sun, 25 Oct 2026 16:30:53 GMT

Good: average US AQI 43 across 18 cities in Arizona Worst now: Chandler (55); cleanest: Yuma (19).

Live US AQI, PM2.5 and ozone for cities across Arizona, compared with the United States average.

Right now the modelled air quality in Arizona averages a US AQI of 43 (Good) across the 18 cities we track. By category: 9 Good, 9 Moderate (of 18).

That is 5 points cleaner than the United States average of 48, ranking 30 of 51 states from cleanest to most polluted.

Chandler has the worst air at 55 (PM2.5 15 µg/m³), and Yuma the cleanest at 19. No tracked city is above 100, so no group needs to change plans.

Arizona cities by AQI (most polluted first)

City	US AQI	Category	PM2.5 µg/m³	PM10 µg/m³	Ozone µg/m³
Chandler	55	Moderate	14.7	71	79
Gilbert	55	Moderate	14.7	71	79
Queen Creek	55	Moderate	14.7	71	79
Phoenix	51	Moderate	7.8	20	79
Mesa	51	Moderate	7.8	20	79
Scottsdale	51	Moderate	7.8	20	79
Tempe	51	Moderate	7.8	20	79
Tempe Junction	51	Moderate	7.8	20	79
Fountain Hills	51	Moderate	7.8	20	79
Glendale	48	Good	7.7	30	85
Peoria	48	Good	7.7	30	85
Surprise	48	Good	7.7	30	85
San Luis	29	Good	2.9	7	89
Florence	29	Good	4	12	95
Flagstaff	28	Good	1.4	3	101
Tucson	27	Good	4.1	9	91
Prescott	25	Good	1.6	3	91
Yuma	19	Good	2.3	6	83

US AQI	Category	What it means
0-50	Good	Air quality is satisfactory and poses little or no risk; a good time for outdoor activity.
51-100	Moderate	Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors.
101-150	Unhealthy for Sensitive Groups	People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors.
151-200	Unhealthy	Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed.
201-300	Very Unhealthy	Health alert: everyone should avoid prolonged or heavy exertion outdoors, and sensitive groups should stay indoors.
301-500	Hazardous	Emergency conditions: everyone should avoid all outdoor physical activity and stay indoors with filtered air if possible. The scale tops out at 500; heavier dust or smoke is shown as 500.

Modelled by CAMS (Copernicus) via Open-Meteo, refreshed twice a day; read hour by hour from the forecast.