Worst air pollution Reading Terminal Market - Philadelphia, today and tomorrow
Today (18 July): Air quality in Reading Terminal Market 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: 34.6/100).
Tomorrow (19 July 2026): Air quality in Reading Terminal Market is fair. All pollutants stay as today. Pollution peaks around 8:00 AM (O3: 34.3/100). 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
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Philadelphia's Reading Terminal Market air quality reflects Market Street's dense commercial canyon position in Center City, with vehicle traffic on Market Street and the surrounding dense urban commercial and transit corridor generating sustained NO₂. The enclosed Market Street canyon geometry concentrates emissions, while the market's enclosed architecture creates distinct indoor air quality dynamics and the surrounding streets maintain consistently elevated Center City Philadelphia readings throughout most of the year.
Today - 18 July | Pollution peaks at 09:00
AQI:
Fair
34.6/100
PM2.5 (fine particles):
Good
16.6/100
PM10 (coarse particles):
Good
9.1/100
NO2 (nitrogen dioxide):
Good
9.5/100
O3 (ozone):
Fair
34.6/100
SO2 (sulfur dioxide):
Good
1.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.5/100
PM1 (ultrafine particles):
Good
11.7/100
Levels show the poorest local air quality during the day
Tomorrow - 19 July | Pollution peaks at 08:00
AQI:
Fair
34.3/100
PM2.5 (fine particles):
Good
14.7/100
PM10 (coarse particles):
Good
10.8/100
NO2 (nitrogen dioxide):
Good
11.3/100
O3 (ozone):
Fair
34.3/100
SO2 (sulfur dioxide):
Good
2.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.7/100
PM1 (ultrafine particles):
Good
10.6/100
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Frequently Asked Questions
Is air quality bad in Reading Terminal Market right now?
On 18 July 2026, overall air quality in Reading Terminal Market is fair. AQI is the main air quality indicator at 34.6/100. Pollution peaks around 9:00 AM (O3: 34.6/100).
Will air quality be worse tomorrow in Reading Terminal Market?
On 19 July 2026, air quality conditions in Reading Terminal Market will be similar to today, with AQI forecast at fair at 34.3/100. Pollution peaks around 8:00 AM (O3: 34.3/100).
When is air pollution at its worst in Reading Terminal Market?
Reading Terminal Market follows Philadelphia's typical seasonal air quality pattern. In short, once summer ozone season ends, winter typically offers the cleanest air, whereas extended summer heat waves, often worsened by regional haze, bring the toughest air quality stretch. Dense urban traffic corridors add a persistent background level of pollution that varies less by season than ozone does.
Are air quality levels in Reading Terminal Market 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: 18 July 2026 at 21:30 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