Worst air pollution Harrisonburg, today and tomorrow
Today (16 July): Air quality in Harrisonburg is fair. AQI, PM2.5, NO2, and O3 are fair; PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 PM (O3: 32.8/100).
Tomorrow (17 July 2026): Air quality in Harrisonburg is fair. All pollutants stay as today. Pollution peaks around 1:00 AM (NO2: 35.6/100). 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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Harrisonburg's air quality reflects the Shenandoah Valley's position between the Blue Ridge and Allegheny mountains, with vehicle emissions from I-81 and the James Madison University campus contributing local sources. The valley's topographic channelling provides ventilation corridors, while summer ozone from the naturally high biogenic Appalachian VOC emissions combining with vehicle NOₓ is the primary warm-season concern and the surrounding apple orchard and poultry farming contribute agricultural aerosols.
Today - 16 July | Pollution peaks at 15:00
AQI:
Fair
32.8/100
PM2.5 (fine particles):
Fair
21.9/100
PM10 (coarse particles):
Good
12.0/100
NO2 (nitrogen dioxide):
Fair
27.0/100
O3 (ozone):
Fair
32.8/100
SO2 (sulfur dioxide):
Good
5.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.8/100
PM1 (ultrafine particles):
Good
15.2/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 01:00
AQI:
Fair
35.6/100
PM2.5 (fine particles):
Fair
22.7/100
PM10 (coarse particles):
Good
13.0/100
NO2 (nitrogen dioxide):
Fair
35.6/100
O3 (ozone):
Fair
34.6/100
SO2 (sulfur dioxide):
Good
4.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.0/100
PM1 (ultrafine particles):
Good
15.7/100
Pollen forecast in Harrisonburg
View pollen forecastFrequently Asked Questions
Is air quality bad in Harrisonburg right now?
On 16 July 2026, overall air quality in Harrisonburg is fair. AQI is the main air quality indicator at 32.8/100. Pollution peaks around 3:00 PM (O3: 32.8/100).
Will air quality be worse tomorrow in Harrisonburg?
On 17 July 2026, air quality conditions in Harrisonburg will be similar to today, with AQI forecast at fair at 35.6/100. Pollution peaks around 1:00 AM (NO2: 35.6/100).
When is air pollution at its worst in Harrisonburg?
Air quality in Harrisonburg shifts across the year — the cleanest stretch of the year usually comes in winter, whereas 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 Harrisonburg 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