Worst air pollution Brownsville, today and tomorrow
Today (9 August): Air quality in Brownsville is poor. AQI and PM10 are poor; O3 is fair; PM2.5 is medium; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 AM (PM10: 77.4/100).
Tomorrow (10 August 2026): Air quality in Brownsville is poor. All pollutants stay as today. Pollution peaks around 11:00 PM (PM10: 71.7/100). 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.
Brownsville's air quality reflects the lower Rio Grande Valley's binational challenge at the southern tip of Texas, with vehicle and agricultural emissions from the Mexico-US border crossing, intensive South Texas irrigation agriculture, and the Port of Brownsville's industrial and LNG export operations contributing a complex mixture of PM2.5, ozone precursors, and industrial emissions. Gulf of Mexico southeasterly breezes generally provide coastal ventilation, while cross-border agricultural burning from Tamaulipas contributes seasonal PM2.5 episodes.
Today - 9 August | Pollution peaks at 04:00
AQI:
Poor
77.4/100
PM2.5 (fine particles):
Medium
53.4/100
PM10 (coarse particles):
Poor
77.4/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Fair
29.0/100
SO2 (sulfur dioxide):
Good
1.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
9.9/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 23:00
AQI:
Poor
71.7/100
PM2.5 (fine particles):
Medium
51.9/100
PM10 (coarse particles):
Poor
71.7/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Fair
30.6/100
SO2 (sulfur dioxide):
Good
4.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.0/100
PM1 (ultrafine particles):
Good
13.3/100
Pollen forecast in Brownsville
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Brownsville
Frequently Asked Questions
Is air quality bad in Brownsville right now?
On 9 August 2026, overall air quality in Brownsville is poor. AQI is the main air quality indicator at 77.4/100. Pollution peaks around 4:00 AM (PM10: 77.4/100).
Will air quality be worse tomorrow in Brownsville?
On 10 August 2026, air quality conditions in Brownsville will be similar to today, with AQI forecast at poor at 71.7/100. Pollution peaks around 11:00 PM (PM10: 71.7/100).
When is air pollution at its worst in Brownsville?
Brownsville's air quality has a clear seasonal rhythm. In short, the cleanest air usually comes in the milder shoulder seasons of spring and autumn, whereas extended summer heat waves bring the year's worst ozone readings in the state's biggest metro areas. Dust from West Texas can occasionally drift across the state and add to particulate levels.
Are air quality levels in Brownsville 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: 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.
Get the full experience in the Airmine app.