Philadelphia air quality today
Air quality in Philadelphia is currently good, with a European index of 24. The concentration of PM2.5 particles is 5 µg/m³ and PM10 is 5 µg/m³. The air is good and safe to spend time outdoors. Over the next 24 hours the air will be cleanest around 3:00 AM (index 20) and most polluted around 9:00 PM (index 58).
Current air quality in Philadelphia
Good
24EAQI
The air is good and safe to spend time outdoors.
- PM2.5
- 5 µg/m³
- PM10
- 5 µg/m³
- Ozone
- 51 µg/m³
Model estimate (Open-Meteo / CAMS) for the city location. It may differ from readings at local stations.
The next 24 hours at a glance
- Index now
- 24
- Good
- Average index
- 32
- Good
- Cleanest air
- 3:00 AM
- index 20
- Most polluted hour
- 9:00 PM
- index 58
- PM2.5
- 5 µg/m³
- PM10
- 5 µg/m³
Air quality in Philadelphia by the hour
- 24Now
- 222 AM
- 203 AM
- 204 AM
- 205 AM
- 236 AM
- 277 AM
- 298 AM
- 269 AM
- 2210 AM
- 2011 AM
- 2012 PM
- 231 PM
- 252 PM
- 273 PM
- 284 PM
- 265 PM
- 386 PM
- 497 PM
- 568 PM
- 589 PM
- 5610 PM
- 5311 PM
- 4812 AM
European Air Quality Index (EAQI) by the hour, a model estimate. A shorter bar means cleaner air.
Pollen in Philadelphia
Pollen data is not available for this location. The pollen model only covers Europe.
Frequently asked questions
How is the air quality in Philadelphia today?
It is currently good (European index 24). PM2.5 is 5 µg/m³, PM10 is 5 µg/m³ and ozone is 51 µg/m³. The average for the next 24 hours is around 32.
What does the European Air Quality Index (EAQI) mean?
The EAQI is a scale used by the European Environment Agency. Up to 20 is excellent air, up to 40 good, up to 60 moderate, up to 80 poor, up to 100 very poor, and above 100 extremely poor. The index is calculated from the concentration of fine particles (PM2.5 and PM10), ozone, nitrogen dioxide and sulphur dioxide.
What are PM2.5 and PM10 particles?
They are tiny particles in the air with a diameter of up to 2.5 and 10 micrometres. They come from traffic, heating and industry, and there are the most of them in winter, on calm days without wind or rain. PM2.5 is more dangerous because it penetrates deep into the lungs.
Are these measurements or estimates?
This is an atmospheric model estimate (Open-Meteo / CAMS) for the city location, not a reading from a local station. Values may therefore differ from station data in some parts of the city.
When is the air cleanest?
The air is usually cleaner during stronger winds, after rain and in the afternoon, when the cold layer near the ground breaks up. It is worst early in the morning and in the evening in the cold part of the year, when heating and traffic increase.