Worst air pollution Mercado District - Tucson, today and tomorrow
Today (9 August): Air quality in Mercado District is fair. AQI, PM2.5, PM10, and O3 are fair; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 6:00 PM (PM10: 30.2/100).
Tomorrow (10 August 2026): Air quality in Mercado District is fair. PM2.5 decreases to good; all other pollutants stay as today. Pollution peaks around 9:00 AM (PM10: 20.7/100). Airmine updates local air quality forecasts four times daily.
Get the full experience in the Airmine app.
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Follow your pollen exposure and performance with the free Airmine–Strava integration. See your pollen and air quality exposure for every Strava activity.
Tucson's Mercado District air quality reflects the new urbanist mixed-use development west of downtown, with vehicle traffic on Congress Street and the surrounding mixed residential and commercial development contributing local sources. The flat terrain allows reasonable dispersal, while the neighbourhood's walkable design and the consistent Tucson afternoon winds generally maintain moderate Tucson metropolitan readings and the Mercado generally tracks at typical West Tucson mixed-use development levels throughout the year.
Today - 9 August | Pollution peaks at 18:00
AQI:
Fair
30.2/100
PM2.5 (fine particles):
Fair
23.7/100
PM10 (coarse particles):
Fair
30.2/100
NO2 (nitrogen dioxide):
Good
1.2/100
O3 (ozone):
Fair
22.7/100
SO2 (sulfur dioxide):
Good
1.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
6.4/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 09:00
AQI:
Fair
20.7/100
PM2.5 (fine particles):
Good
18.9/100
PM10 (coarse particles):
Fair
20.7/100
NO2 (nitrogen dioxide):
Good
2.5/100
O3 (ozone):
Fair
20.2/100
SO2 (sulfur dioxide):
Good
1.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.1/100
PM1 (ultrafine particles):
Good
6.6/100
Other Landmarks in Tucson
Sports venues in Tucson
Frequently Asked Questions
Is air quality bad in Mercado District right now?
On 9 August 2026, overall air quality in Mercado District is fair. AQI is the main air quality indicator at 30.2/100. Pollution peaks around 6:00 PM (PM10: 30.2/100).
Will air quality be worse tomorrow in Mercado District?
On 10 August 2026, air quality conditions in Mercado District will be similar to today, with AQI forecast at fair at 20.7/100. Pollution peaks around 9:00 AM (PM10: 20.7/100).
When is air pollution at its worst in Mercado District?
Mercado District's air quality follows a clear seasonal pattern. In short, the cooler winter months typically bring the cleanest air of the year, whereas intense summer heat combines with occasional dust events to create the year's worst episodes. Sudden haboob-style dust storms can appear with little warning during the spring wind season.
Are air quality levels in Mercado District 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.
Want to see air quality forecasts for other cities in United States?
Check air quality in other popular cities:
Data provided by Airmine — Last update: 10 August 2026 at 02:34 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.
Get the full experience in the Airmine app.