Worst air pollution Mercado District - Tucson, today and tomorrow
Today (15 July): 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 7:00 AM (PM10: 34.2/100).
Tomorrow (16 July 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 (O3: 27.5/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Use our Strava plugin to check your own exposure.
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 - 15 July | Pollution peaks at 07:00
AQI:
Fair
34.2/100
PM2.5 (fine particles):
Fair
22.0/100
PM10 (coarse particles):
Fair
34.2/100
NO2 (nitrogen dioxide):
Good
0.9/100
O3 (ozone):
Fair
27.1/100
SO2 (sulfur dioxide):
Good
3.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
4.0/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 09:00
AQI:
Fair
27.5/100
PM2.5 (fine particles):
Good
13.3/100
PM10 (coarse particles):
Fair
21.0/100
NO2 (nitrogen dioxide):
Good
1.3/100
O3 (ozone):
Fair
27.5/100
SO2 (sulfur dioxide):
Good
3.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
3.2/100
Other Landmarks in Tucson
Sports venues in Tucson
Frequently Asked Questions
Is air quality bad in Mercado District right now?
On 15 July 2026, overall air quality in Mercado District is fair. AQI is the main air quality indicator at 34.2/100. Pollution peaks around 7:00 AM (PM10: 34.2/100).
Will air quality be worse tomorrow in Mercado District?
On 16 July 2026, air quality conditions in Mercado District will be similar to today, with AQI forecast at fair at 27.5/100. Pollution peaks around 9:00 AM (O3: 27.5/100).
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.
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: 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