Worst air pollution Altoona, today and tomorrow
Today (16 July): Air quality in Altoona 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: 36.2/100).
Tomorrow (17 July 2026): Air quality in Altoona is fair. NO2 increases to fair; all other pollutants stay as today. Pollution peaks around 9:00 AM (O3: 38.9/100). 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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Altoona's air quality reflects the Pennsylvania Allegheny Mountain valley position, with vehicle emissions from I-99 and the surrounding manufacturing and logistics legacy contributing local sources in this former Pennsylvania Railroad hub. The surrounding Allegheny ridgelines create topographic enclosure that concentrates vehicle and heating emissions under winter inversions, while summer ozone from the naturally high biogenic Appalachian VOC emissions and the regional mid-Atlantic airshed are primary warm-season concerns.
Today - 16 July | Pollution peaks at 09:00
AQI:
Fair
36.2/100
PM2.5 (fine particles):
Good
13.9/100
PM10 (coarse particles):
Good
11.4/100
NO2 (nitrogen dioxide):
Good
19.6/100
O3 (ozone):
Fair
36.2/100
SO2 (sulfur dioxide):
Good
2.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.2/100
PM1 (ultrafine particles):
Good
7.7/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 09:00
AQI:
Fair
38.9/100
PM2.5 (fine particles):
Good
12.1/100
PM10 (coarse particles):
Good
6.6/100
NO2 (nitrogen dioxide):
Fair
21.1/100
O3 (ozone):
Fair
38.9/100
SO2 (sulfur dioxide):
Good
2.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.7/100
PM1 (ultrafine particles):
Good
7.1/100
Pollen forecast in Altoona
View pollen forecastFrequently Asked Questions
Is air quality bad in Altoona right now?
On 16 July 2026, overall air quality in Altoona is fair. AQI is the main air quality indicator at 36.2/100. Pollution peaks around 9:00 AM (O3: 36.2/100).
Will air quality be worse tomorrow in Altoona?
On 17 July 2026, air quality conditions in Altoona will be similar to today, with AQI forecast at fair at 38.9/100. Pollution peaks around 9:00 AM (O3: 38.9/100).
When is air pollution at its worst in Altoona?
Altoona follows a fairly predictable seasonal air quality pattern: winter generally brings the cleanest air, once the summer ozone season has passed, but the hottest, most humid summer weeks bring the year's highest ozone readings. Suburban and rural areas generally see less of the persistent traffic-driven pollution that affects the urban core.
Are air quality levels in Altoona 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.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 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.
For long term forecasts and maps, see the Airmine app