Worst air pollution Barrio Viejo - Tucson, today and tomorrow
Today (15 July): Air quality in Barrio Viejo is fair. PM2.5 and O3 are fair; AQI and PM10 are medium; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 7:00 AM (PM10: 40.9/100).
Tomorrow (16 July 2026): Air quality in Barrio Viejo is fair. AQI worsens to fair; PM2.5 decreases to good; PM10 increases to fair; 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
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Tucson's Barrio Viejo air quality reflects the historic Mexican-American neighbourhood adjacent to downtown, with vehicle traffic on the surrounding arterials contributing local sources. The Sonoran Desert basin creates temperature inversion episodes, while the neighbourhood's historic low-density character and the consistent afternoon desert winds generally maintain moderate Tucson metropolitan readings and Barrio Viejo generally tracks at typical inner Tucson historic neighbourhood levels throughout the year.
Today - 15 July | Pollution peaks at 07:00
AQI:
Medium
40.9/100
PM2.5 (fine particles):
Fair
27.4/100
PM10 (coarse particles):
Medium
40.9/100
NO2 (nitrogen dioxide):
Good
1.7/100
O3 (ozone):
Fair
27.1/100
SO2 (sulfur dioxide):
Good
5.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
5.1/100
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
16.9/100
PM10 (coarse particles):
Fair
25.5/100
NO2 (nitrogen dioxide):
Good
2.3/100
O3 (ozone):
Fair
27.5/100
SO2 (sulfur dioxide):
Good
7.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
4.0/100
Other Landmarks in Tucson
Sports venues in Tucson
Frequently Asked Questions
Is air quality bad in Barrio Viejo right now?
On 15 July 2026, overall air quality in Barrio Viejo is fair. PM2.5 is the main pollutant at 27.4/100. Pollution peaks around 7:00 AM (PM10: 40.9/100).
Will air quality be worse tomorrow in Barrio Viejo?
On 16 July 2026, air quality conditions in Barrio Viejo 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 Barrio Viejo?
Barrio Viejo experiences the same seasonal air quality swings as the rest of Tucson — the calmest, cleanest stretch usually falls between late autumn and early spring, 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 Barrio Viejo 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