Worst air pollution Casa Grande, today and tomorrow
Today (9 August): Air quality in Casa Grande is fair. AQI, PM2.5, PM10, and O3 are fair; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 AM (PM10: 28.6/100).
Tomorrow (10 August 2026): Air quality in Casa Grande is fair. PM2.5 decreases to good; all other pollutants stay as today. Pollution peaks around 5:00 AM (PM10: 21.0/100). 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 - 9 August | Pollution peaks at 04:00
AQI:
Fair
28.6/100
PM2.5 (fine particles):
Fair
20.2/100
PM10 (coarse particles):
Fair
28.6/100
NO2 (nitrogen dioxide):
Good
3.2/100
O3 (ozone):
Fair
22.8/100
SO2 (sulfur dioxide):
Good
2.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.0/100
PM1 (ultrafine particles):
Good
6.7/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 05:00
AQI:
Fair
21.0/100
PM2.5 (fine particles):
Good
19.2/100
PM10 (coarse particles):
Fair
21.0/100
NO2 (nitrogen dioxide):
Good
6.7/100
O3 (ozone):
Fair
21.0/100
SO2 (sulfur dioxide):
Good
2.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.2/100
PM1 (ultrafine particles):
Good
7.0/100
Pollen forecast in Casa Grande
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Casa Grande
Frequently Asked Questions
Is air quality bad in Casa Grande right now?
On 9 August 2026, overall air quality in Casa Grande is fair. AQI is the main air quality indicator at 28.6/100. Pollution peaks around 4:00 AM (PM10: 28.6/100).
Will air quality be worse tomorrow in Casa Grande?
On 10 August 2026, air quality conditions in Casa Grande will be similar to today, with AQI forecast at fair at 21.0/100. Pollution peaks around 5:00 AM (PM10: 21.0/100).
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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 9 August 2026 at 20:27 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
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