Worst air pollution Rockville, today and tomorrow
Today (16 July): Air quality in Rockville 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 Rockville 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.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Rockville's air quality reflects the Montgomery County Maryland suburban corridor northwest of Washington DC, with vehicle emissions from I-270 and the surrounding NIH, FDA, and government biomedical research corridor contributing local sources. The broader Washington metropolitan airshed contributes regional ozone, while the Rock Creek corridor provides limited ventilation and Rockville's government research character generally maintains moderate conditions relative to the broader mid-Atlantic pollution background throughout the year.
Today - 16 July | Pollution peaks at 13:00
AQI:
Fair
35.2/100
PM2.5 (fine particles):
Good
17.5/100
PM10 (coarse particles):
Good
11.6/100
NO2 (nitrogen dioxide):
Fair
28.5/100
O3 (ozone):
Fair
35.2/100
SO2 (sulfur dioxide):
Good
4.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.5/100
PM1 (ultrafine particles):
Good
12.1/100
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
21.5/100
PM10 (coarse particles):
Good
13.8/100
NO2 (nitrogen dioxide):
Fair
27.6/100
O3 (ozone):
Fair
39.5/100
SO2 (sulfur dioxide):
Good
5.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.6/100
PM1 (ultrafine particles):
Good
14.0/100
Pollen forecast in Rockville
View pollen forecastFrequently Asked Questions
Is air quality bad in Rockville right now?
On 16 July 2026, overall air quality in Rockville 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 Rockville?
On 17 July 2026, air quality conditions in Rockville 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 Rockville?
Air quality across Rockville rises and falls with the seasons, as the cleanest stretch of the year usually comes in winter; 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 Rockville 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