Highest air pollution Leesburg, today and tomorrow
Today (1 July): Air quality in Leesburg is fair. O3 is fair; AQI, PM2.5, and PM10 are medium; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 AM (PM10: 48.0/100).
Tomorrow (2 July 2026): Air quality in Leesburg is fair. PM2.5 increases to fair; all other pollutants stay as today. Pollution peaks around 12:00 AM (PM10: 43.0/100). 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
Leesburg's air quality in Virginia reflects its position in the Loudoun County Piedmont, with vehicle emissions from US-15 and the Dulles Greenway and the surrounding data center and technology corridor — Loudoun hosting the world's largest data center concentration — contributing elevated diesel generator testing and backup power emissions alongside the primary vehicle sources. The Catoctin Mountain to the northwest and the Bull Run Mountains to the south create modest topographic enclosure, while the Washington DC metropolitan airshed contributes regional background ozone.
Today - 1 July | Pollution peaks at 00:00
AQI:
Medium
48.0/100
PM2.5 (fine particles):
Medium
42.4/100
PM10 (coarse particles):
Medium
48.0/100
NO2 (nitrogen dioxide):
Good
0.0/100
O3 (ozone):
Fair
28.4/100
SO2 (sulfur dioxide):
Good
0.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.1/100
PM1 (ultrafine particles):
Good
9.2/100
Levels show the poorest local air quality during the day
Tomorrow - 2 July | Pollution peaks at 00:00
AQI:
Medium
43.0/100
PM2.5 (fine particles):
Fair
37.7/100
PM10 (coarse particles):
Medium
43.0/100
NO2 (nitrogen dioxide):
Good
0.0/100
O3 (ozone):
Fair
27.4/100
SO2 (sulfur dioxide):
Good
0.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.2/100
PM1 (ultrafine particles):
Good
5.4/100
Pollen forecast in Leesburg
View pollen forecastFrequently Asked Questions
Is air quality bad in Leesburg right now?
On 1 July 2026, overall air quality in Leesburg is fair. O3 is the main pollutant at 28.4/100. Pollution peaks around 12:00 AM (PM10: 48.0/100).
Will air quality be worse tomorrow in Leesburg?
On 2 July 2026, air quality conditions in Leesburg will be similar to today, with PM2.5 forecast at fair at 37.7/100. Pollution peaks around 12:00 AM (PM10: 43.0/100).
Are air quality levels in Leesburg 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: 1 July 2026 at 13:04 CET (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
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team