Worst air pollution Hagerstown, today and tomorrow
Today (16 July): Air quality in Hagerstown is fair. PM2.5 and O3 are fair; AQI and NO2 are medium; PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (NO2: 43.6/100).
Tomorrow (17 July 2026): Air quality in Hagerstown is fair. All pollutants stay as today. Pollution peaks around 1:00 AM (NO2: 46.9/100). 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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Hagerstown's air quality reflects its position in the Cumberland Valley's partial topographic enclosure between South Mountain to the east and Fairview Mountain to the west in western Maryland, with vehicle emissions from I-81 and I-70 generating concentrated freight and commuter traffic through this major interstate crossroads. The valley floor can concentrate emissions under winter inversions, while the broader mid-Atlantic regional airshed contributes upwind industrial and urban sources from the Baltimore-Washington corridor under prevailing southeasterly winds.
Today - 16 July | Pollution peaks at 23:00
AQI:
Medium
43.6/100
PM2.5 (fine particles):
Fair
23.2/100
PM10 (coarse particles):
Good
18.2/100
NO2 (nitrogen dioxide):
Medium
43.6/100
O3 (ozone):
Fair
37.2/100
SO2 (sulfur dioxide):
Good
10.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.1/100
PM1 (ultrafine particles):
Good
15.7/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 01:00
AQI:
Medium
46.9/100
PM2.5 (fine particles):
Fair
25.5/100
PM10 (coarse particles):
Good
16.0/100
NO2 (nitrogen dioxide):
Medium
46.9/100
O3 (ozone):
Fair
39.1/100
SO2 (sulfur dioxide):
Good
9.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.1/100
PM1 (ultrafine particles):
Good
17.4/100
Pollen forecast in Hagerstown
View pollen forecastFrequently Asked Questions
Is air quality bad in Hagerstown right now?
On 16 July 2026, overall air quality in Hagerstown is fair. O3 is the main pollutant at 37.2/100. Pollution peaks around 11:00 PM (NO2: 43.6/100).
Will air quality be worse tomorrow in Hagerstown?
On 17 July 2026, air quality conditions in Hagerstown will be similar to today, with O3 forecast at fair at 39.1/100. Pollution peaks around 1:00 AM (NO2: 46.9/100).
When is air pollution at its worst in Hagerstown?
Seasonal changes shape air quality across Hagerstown. In short, once summer ozone season ends, winter typically offers the cleanest air, whereas extended summer heat waves, often worsened by regional haze, bring the toughest air quality stretch. Dense urban traffic corridors add a persistent background level of pollution that varies less by season than ozone does.
Are air quality levels in Hagerstown 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