Highest air pollution Philadelphia, today and tomorrow
Today (28 June): Air quality in Philadelphia is medium. AQI and O3 are medium; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 AM (O3: 42.3/100).
Tomorrow (29 June 2026): Air quality in Philadelphia is fair. AQI worsens to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 12:00 PM (O3: 34.1/100). 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
Philadelphia's air quality reflects its position in the mid-Atlantic corridor, where regional ozone and PM2.5 from upwind sources combine with local traffic and industrial emissions from the Delaware River refineries. The Schuylkill and Delaware river corridors provide ventilation pathways, while summer heat amplifies ozone formation across the wider region.
Today - 28 June | Pollution peaks at 09:00
AQI:
Medium
42.3/100
PM2.5 (fine particles):
Good
5.5/100
PM10 (coarse particles):
Good
2.2/100
NO2 (nitrogen dioxide):
Good
6.4/100
O3 (ozone):
Medium
42.3/100
SO2 (sulfur dioxide):
Good
1.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.6/100
PM1 (ultrafine particles):
Good
6.0/100
Levels show the poorest local air quality during the day
Tomorrow - 29 June | Pollution peaks at 12:00
AQI:
Fair
34.1/100
PM2.5 (fine particles):
Good
4.3/100
PM10 (coarse particles):
Good
2.1/100
NO2 (nitrogen dioxide):
Good
8.1/100
O3 (ozone):
Fair
34.1/100
SO2 (sulfur dioxide):
Good
1.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.0/100
PM1 (ultrafine particles):
Good
4.0/100
Pollen forecast in Philadelphia
View pollen forecastFrequently Asked Questions
Is air quality bad in Philadelphia right now?
On 28 June 2026, overall air quality in Philadelphia is medium. AQI is the main air quality indicator at 42.3/100. Pollution peaks around 9:00 AM (O3: 42.3/100).
Will air quality be worse tomorrow in Philadelphia?
On 29 June 2026, air quality conditions in Philadelphia will be worse than today, with AQI forecast at fair at 34.1/100. Pollution peaks around 12:00 PM (O3: 34.1/100).
Are air quality levels in Philadelphia 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: 28 June 2026 at 12:36 CET (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
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team