Worst air pollution Aspen Hill, today and tomorrow
Today (16 July): Air quality in Aspen Hill is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 PM (O3: 35.2/100).
Tomorrow (17 July 2026): Air quality in Aspen Hill is fair. PM2.5 increases to fair; all other pollutants stay as today. Pollution peaks around 12:00 PM (O3: 39.5/100). 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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Aspen Hill's air quality reflects the Montgomery County Maryland suburban corridor northwest of Washington DC, with vehicle emissions from I-270 and MD-586 the primary local sources in this major unincorporated Maryland suburb. The broader Washington DC metropolitan airshed contributes regional ozone, while the flat suburban Maryland terrain allows reasonable dispersal and Aspen Hill's affluent residential and research corridor character generally maintains moderate conditions relative to the broader mid-Atlantic regional pollution background throughout the year.
Today - 16 July | Pollution peaks at 13:00
AQI:
Fair
35.2/100
PM2.5 (fine particles):
Good
17.0/100
PM10 (coarse particles):
Good
11.3/100
NO2 (nitrogen dioxide):
Fair
26.6/100
O3 (ozone):
Fair
35.2/100
SO2 (sulfur dioxide):
Good
4.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.5/100
PM1 (ultrafine particles):
Good
11.8/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 12:00
AQI:
Fair
39.5/100
PM2.5 (fine particles):
Fair
20.9/100
PM10 (coarse particles):
Good
13.4/100
NO2 (nitrogen dioxide):
Fair
25.8/100
O3 (ozone):
Fair
39.5/100
SO2 (sulfur dioxide):
Good
4.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.6/100
PM1 (ultrafine particles):
Good
13.5/100
Pollen forecast in Aspen Hill
View pollen forecastFrequently Asked Questions
Is air quality bad in Aspen Hill right now?
On 16 July 2026, overall air quality in Aspen Hill is fair. AQI is the main air quality indicator at 35.2/100. Pollution peaks around 1:00 PM (O3: 35.2/100).
Will air quality be worse tomorrow in Aspen Hill?
On 17 July 2026, air quality conditions in Aspen Hill will be similar to today, with AQI forecast at fair at 39.5/100. Pollution peaks around 12:00 PM (O3: 39.5/100).
When is air pollution at its worst in Aspen Hill?
Seasonal changes shape air quality across Aspen Hill. In short, winter generally brings the cleanest air, once the summer ozone season has passed, whereas 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 Aspen Hill 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