What is the air quality trend in Tucson?

Over the past 8 days, Tucson had an average AQI of 64 based on station measurements. The worst day was 2026-07-16 with AQI 111.

How is Tucson air quality measured?

Air quality in Tucson is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Tucson, United States

Name: Tucson Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Tucson, United States.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

161h

PM2.5 Station

161h · 6 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	42	11–84	10.8 µg/m³	18h	4
2026-07-20	53	5–126	15.2 µg/m³	24h	4
2026-07-19	63	29–140	18.8 µg/m³	22h	5
2026-07-18	76	9–171	27.0 µg/m³	23h	5
2026-07-17	78	20–194	36.4 µg/m³	23h	5
2026-07-16	111	37–199	50.5 µg/m³	24h	6
2026-07-15	49	23–132	12.9 µg/m³	24h	5
2026-07-14	45	41–47	10.7 µg/m³	3h	5

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