Worst air pollution Grays Ferry - Philadelphia, today and tomorrow
Today (20 September): Air quality in Grays Ferry is fair. AQI, PM2.5, NO2, O3, and PM1 are fair; PM10, SO2, CO, and HCHO are good. Pollution peaks around 7:00 AM (PM1: 38.5/100).
Tomorrow (21 September 2026): Air quality in Grays Ferry is fair. PM2.5 decreases to good; PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 3:00 PM (NO2: 31.5/100). 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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In Grays Ferry, the mix of heavy road traffic and urban density keeps particulate matter and nitrogen dioxide levels persistently elevated. Nearby trees help trap a portion of this particulate load before it spreads. The surrounding area tends to follow a similar pattern, with only minor local variation. Wind patterns on any given day can shift this picture meaningfully in either direction.
Today - 20 September | Pollution peaks at 07:00
AQI:
Fair
38.5/100
PM2.5 (fine particles):
Fair
25.5/100
PM10 (coarse particles):
Good
16.5/100
NO2 (nitrogen dioxide):
Fair
30.0/100
O3 (ozone):
Fair
20.3/100
SO2 (sulfur dioxide):
Good
1.1/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
2.7/100
PM1 (ultrafine particles):
Fair
38.5/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 15:00
AQI:
Fair
31.5/100
PM2.5 (fine particles):
Good
16.8/100
PM10 (coarse particles):
Good
12.6/100
NO2 (nitrogen dioxide):
Fair
31.5/100
O3 (ozone):
Fair
26.0/100
SO2 (sulfur dioxide):
Good
2.1/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
3.8/100
PM1 (ultrafine particles):
Good
19.7/100
Other Landmarks in Philadelphia
Sports venues in Philadelphia
Frequently Asked Questions
Is air quality bad in Grays Ferry right now?
On 20 September 2026, overall air quality in Grays Ferry is fair. AQI is the main air quality indicator at 38.5/100. Pollution peaks around 7:00 AM (PM1: 38.5/100).
Will air quality be worse tomorrow in Grays Ferry?
On 21 September 2026, air quality conditions in Grays Ferry will be similar to today, with AQI forecast at fair at 31.5/100. Pollution peaks around 3:00 PM (NO2: 31.5/100).
When is air pollution at its worst in Grays Ferry?
Cold-season conditions typically drive the sharpest particulate increases in dense urban areas like this, as urban heating and steady traffic emissions concentrate under inversions typical of calm winter days. As the weather warms, ozone typically overtakes particulate matter as the top concern here, with summer's combination of heat, sun, and dense traffic driving some of the year's highest ozone readings.
Are air quality levels in Grays Ferry 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: 20 September 2026 at 14:33 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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