Worst air pollution Allentown, today and tomorrow
Today (16 July): Air quality in Allentown is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 AM (O3: 36.2/100).
Tomorrow (17 July 2026): Air quality in Allentown is fair. All pollutants stay as today. Pollution peaks around 9:00 AM (O3: 38.9/100). 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.
Allentown's air quality reflects the Lehigh Valley's position in the northeastern US mid-Atlantic corridor, with vehicle emissions from I-78 and the regional highway network combining with upwind industrial and urban sources from the New York and New Jersey metropolitan area. The surrounding Pennsylvania ridgelines provide partial topographic barriers, while the valley floor concentrates emissions under calm winter anticyclonic conditions.
Today - 16 July | Pollution peaks at 09:00
AQI:
Fair
36.2/100
PM2.5 (fine particles):
Good
9.6/100
PM10 (coarse particles):
Good
7.8/100
NO2 (nitrogen dioxide):
Good
3.6/100
O3 (ozone):
Fair
36.2/100
SO2 (sulfur dioxide):
Good
0.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.2/100
PM1 (ultrafine particles):
Good
5.3/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 09:00
AQI:
Fair
38.9/100
PM2.5 (fine particles):
Good
8.3/100
PM10 (coarse particles):
Good
4.5/100
NO2 (nitrogen dioxide):
Good
4.0/100
O3 (ozone):
Fair
38.9/100
SO2 (sulfur dioxide):
Good
0.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.7/100
PM1 (ultrafine particles):
Good
4.9/100
Pollen forecast in Allentown
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Allentown
Frequently Asked Questions
Is air quality bad in Allentown right now?
On 16 July 2026, overall air quality in Allentown is fair. AQI is the main air quality indicator at 36.2/100. Pollution peaks around 9:00 AM (O3: 36.2/100).
Will air quality be worse tomorrow in Allentown?
On 17 July 2026, air quality conditions in Allentown will be similar to today, with AQI forecast at fair at 38.9/100. Pollution peaks around 9:00 AM (O3: 38.9/100).
When is air pollution at its worst in Allentown?
Allentown experiences a distinct seasonal swing in air quality, as once summer ozone season ends, winter typically offers the cleanest air; by contrast, the hottest, most humid summer weeks bring the year's highest ozone readings. Suburban and rural areas generally see less of the persistent traffic-driven pollution that affects the urban core.
Are air quality levels in Allentown 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