Worst air pollution Casa Grande, today and tomorrow
Today (15 July): Air quality in Casa Grande is fair. PM2.5 and O3 are fair; AQI and PM10 are medium; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 8:00 AM (PM10: 41.3/100).
Tomorrow (16 July 2026): Air quality in Casa Grande is fair. AQI worsens to fair; PM2.5 decreases to good; PM10 increases to fair; all other pollutants stay as today. Pollution peaks around 6:00 AM (PM10: 30.7/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Casa Grande's air quality reflects the Sonoran Desert basin position in Pinal County Arizona between the Phoenix and Tucson metropolitan areas, with vehicle emissions from I-10 and I-8 and the surrounding agricultural and copper mining operations contributing local sources. Windblown desert dust contributes PM10 episodes, while summer monsoon ozone from vehicle and desert emissions and the agricultural irrigation operations' ammonia represent the primary seasonal air quality concerns throughout the year.
Today - 15 July | Pollution peaks at 08:00
AQI:
Medium
41.3/100
PM2.5 (fine particles):
Fair
26.1/100
PM10 (coarse particles):
Medium
41.3/100
NO2 (nitrogen dioxide):
Good
2.2/100
O3 (ozone):
Fair
26.9/100
SO2 (sulfur dioxide):
Good
4.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.0/100
PM1 (ultrafine particles):
Good
4.4/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 06:00
AQI:
Fair
30.7/100
PM2.5 (fine particles):
Good
18.1/100
PM10 (coarse particles):
Fair
30.7/100
NO2 (nitrogen dioxide):
Good
3.1/100
O3 (ozone):
Fair
28.0/100
SO2 (sulfur dioxide):
Good
5.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
3.7/100
Pollen forecast in Casa Grande
View pollen forecastFrequently Asked Questions
Is air quality bad in Casa Grande right now?
On 15 July 2026, overall air quality in Casa Grande is fair. O3 is the main pollutant at 26.9/100. Pollution peaks around 8:00 AM (PM10: 41.3/100).
Will air quality be worse tomorrow in Casa Grande?
On 16 July 2026, air quality conditions in Casa Grande will be similar to today, with AQI forecast at fair at 30.7/100. Pollution peaks around 6:00 AM (PM10: 30.7/100).
When is air pollution at its worst in Casa Grande?
Like most US cities, Casa Grande sees air quality shift from season to season, as the calmest, cleanest stretch usually falls between late autumn and early spring; by contrast, summer heat drives ozone formation, and blowing dust from spring winds can push particulate levels up abruptly. Monsoon storms in July and August can either clear the air with rain or stir up dust ahead of the storm front.
Are air quality levels in Casa Grande based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app