Worst air pollution State College, today and tomorrow
Today (9 August): Air quality in State College is fair. AQI, NO2, O3, and PM1 are fair; PM2.5, PM10, SO2, CO, and HCHO are good. Pollution peaks around 11:00 AM (O3: 38.1/100).
Tomorrow (10 August 2026): Air quality in State College is fair. PM2.5 increases to fair; all other pollutants stay as today. Pollution peaks around 11:00 AM (O3: 36.1/100). Airmine updates local air quality forecasts four times daily.
Get the full experience in the Airmine app.
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Follow your pollen exposure and performance with the free Airmine–Strava integration. See your pollen and air quality exposure for every Strava activity.
State College's air quality benefits from the Pennsylvania Ridge and Valley terrain with Penn State University campus traffic and vehicle emissions from US-322 the primary local sources. The surrounding Nittany Valley and the enclosing Bald Eagle and Tussey mountain ridgelines create topographic variation, while summer ozone from the naturally high biogenic Appalachian VOC emissions and the broader mid-Atlantic regional airshed is the primary warm-season concern.
Today - 9 August | Pollution peaks at 11:00
AQI:
Fair
38.1/100
PM2.5 (fine particles):
Good
19.1/100
PM10 (coarse particles):
Good
5.3/100
NO2 (nitrogen dioxide):
Fair
25.6/100
O3 (ozone):
Fair
38.1/100
SO2 (sulfur dioxide):
Good
2.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.9/100
PM1 (ultrafine particles):
Fair
24.0/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 11:00
AQI:
Fair
36.1/100
PM2.5 (fine particles):
Fair
24.4/100
PM10 (coarse particles):
Good
8.6/100
NO2 (nitrogen dioxide):
Fair
27.9/100
O3 (ozone):
Fair
36.1/100
SO2 (sulfur dioxide):
Good
2.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.3/100
PM1 (ultrafine particles):
Fair
28.6/100
Pollen forecast in State College
View pollen forecastSports venues in State College
Frequently Asked Questions
Is air quality bad in State College right now?
On 9 August 2026, overall air quality in State College is fair. AQI is the main air quality indicator at 38.1/100. Pollution peaks around 11:00 AM (O3: 38.1/100).
Will air quality be worse tomorrow in State College?
On 10 August 2026, air quality conditions in State College will be similar to today, with AQI forecast at fair at 36.1/100. Pollution peaks around 11:00 AM (O3: 36.1/100).
When is air pollution at its worst in State College?
Seasonal changes shape air quality across State College: the calmest air of the year usually arrives well after the summer ozone season fades, but summer heat waves bring the highest ozone risk, compounded by pollution drifting in from the wider region. Suburban and rural areas generally see less of the persistent traffic-driven pollution that affects the urban core.
Are air quality levels in State College 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.
Want to see air quality forecasts for other cities in United States?
Check air quality in other popular cities:
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.
Get the full experience in the Airmine app.