Worst air pollution Port Arthur, today and tomorrow
Today (9 August): Air quality in Port Arthur is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 6:00 AM (O3: 23.9/100).
Tomorrow (10 August 2026): Air quality in Port Arthur is fair. All pollutants stay as today. Pollution peaks around 7:00 AM (O3: 25.1/100). Airmine updates local air quality forecasts four times daily.
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Port Arthur's air quality faces Texas' most severe combined industrial challenge, with the Valero, Total, and Motiva refineries forming one of the US's densest petrochemical concentrations generating some of the nation's highest industrial SO₂, benzene, and PM2.5 readings. Gulf Coast breezes provide periodic ventilation, but the refinery density makes Port Arthur one of the US's most persistently industrially impacted communities.
Today - 9 August | Pollution peaks at 06:00
AQI:
Fair
23.9/100
PM2.5 (fine particles):
Good
15.9/100
PM10 (coarse particles):
Good
14.6/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Fair
23.9/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
1.0/100
PM1 (ultrafine particles):
Good
3.1/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 07:00
AQI:
Fair
25.1/100
PM2.5 (fine particles):
Good
11.0/100
PM10 (coarse particles):
Good
10.3/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Fair
25.1/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
3.3/100
Pollen forecast in Port Arthur
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Port Arthur
Frequently Asked Questions
Is air quality bad in Port Arthur right now?
On 9 August 2026, overall air quality in Port Arthur is fair. AQI is the main air quality indicator at 23.9/100. Pollution peaks around 6:00 AM (O3: 23.9/100).
Will air quality be worse tomorrow in Port Arthur?
On 10 August 2026, air quality conditions in Port Arthur will be similar to today, with AQI forecast at fair at 25.1/100. Pollution peaks around 7:00 AM (O3: 25.1/100).
When is air pollution at its worst in Port Arthur?
Like most US cities, Port Arthur sees air quality shift from season to season — the mildest, cleanest stretch typically falls in spring or autumn, whereas long, hot summers bring the highest ozone risk, especially across the major urban corridors. Gulf Coast humidity and inland heat can each add their own seasonal pollution patterns.
Are air quality levels in Port Arthur 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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