Worst air pollution Pittsburgh, today and tomorrow
Today (9 August): Air quality in Pittsburgh 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: 34.2/100).
Tomorrow (10 August 2026): Air quality in Pittsburgh is fair. PM2.5 increases to fair; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 10:00 AM (O3: 35.6/100). 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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Pittsburgh's air quality has improved dramatically since the steel era but remains influenced by the three river valleys' tendency to trap emissions under temperature inversions, particularly in winter. The surrounding Appalachian ridgelines limit dispersal on calm days, and although industrial emissions have declined substantially, the valley topography continues to concentrate vehicle and residential emissions.
Today - 9 August | Pollution peaks at 09:00
AQI:
Fair
34.2/100
PM2.5 (fine particles):
Good
14.4/100
PM10 (coarse particles):
Good
4.1/100
NO2 (nitrogen dioxide):
Good
12.3/100
O3 (ozone):
Fair
34.2/100
SO2 (sulfur dioxide):
Good
1.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.7/100
PM1 (ultrafine particles):
Good
19.5/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 10:00
AQI:
Fair
35.6/100
PM2.5 (fine particles):
Fair
20.1/100
PM10 (coarse particles):
Good
6.1/100
NO2 (nitrogen dioxide):
Good
15.2/100
O3 (ozone):
Fair
35.6/100
SO2 (sulfur dioxide):
Good
1.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.7/100
PM1 (ultrafine particles):
Fair
24.9/100
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Frequently Asked Questions
Is air quality bad in Pittsburgh right now?
On 9 August 2026, overall air quality in Pittsburgh is fair. AQI is the main air quality indicator at 34.2/100. Pollution peaks around 9:00 AM (O3: 34.2/100).
Will air quality be worse tomorrow in Pittsburgh?
On 10 August 2026, air quality conditions in Pittsburgh will be similar to today, with AQI forecast at fair at 35.6/100. Pollution peaks around 10:00 AM (O3: 35.6/100).
When is air pollution at its worst in Pittsburgh?
Air quality in Pittsburgh shifts across the year, as the calmest air of the year usually arrives well after the summer ozone season fades; by contrast, hot, humid summer conditions and regional haze drive ozone spikes, especially during heat waves. Suburban and rural areas generally see less of the persistent traffic-driven pollution that affects the urban core.
Are air quality levels in Pittsburgh 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: 9 August 2026 at 20:27 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.
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