Worst air pollution Port Arthur, today and tomorrow
Today (16 July): Air quality in Port Arthur is fair. AQI, PM10, and O3 are fair; PM2.5, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 AM (O3: 29.8/100).
Tomorrow (17 July 2026): Air quality in Port Arthur is fair. PM10 decreases to good; all other pollutants stay as today. Pollution peaks around 12:00 PM (O3: 26.5/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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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 - 16 July | Pollution peaks at 11:00
AQI:
Fair
29.8/100
PM2.5 (fine particles):
Good
14.9/100
PM10 (coarse particles):
Fair
22.3/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Fair
29.8/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
0.8/100
PM1 (ultrafine particles):
Good
3.0/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 12:00
AQI:
Fair
26.5/100
PM2.5 (fine particles):
Good
12.1/100
PM10 (coarse particles):
Good
12.2/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Fair
26.5/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
0.8/100
PM1 (ultrafine particles):
Good
2.6/100
Pollen forecast in Port Arthur
View pollen forecastFrequently Asked Questions
Is air quality bad in Port Arthur right now?
On 16 July 2026, overall air quality in Port Arthur is fair. AQI is the main air quality indicator at 29.8/100. Pollution peaks around 11:00 AM (O3: 29.8/100).
Will air quality be worse tomorrow in Port Arthur?
On 17 July 2026, air quality conditions in Port Arthur will be similar to today, with AQI forecast at fair at 26.5/100. Pollution peaks around 12:00 PM (O3: 26.5/100).
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.
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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