Worst air pollution Nashua, today and tomorrow
Today (16 July): Air quality in Nashua is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 PM (O3: 35.4/100).
Tomorrow (17 July 2026): Air quality in Nashua is fair. NO2 decreases to good; all other pollutants stay as today. Pollution peaks around 10:00 AM (O3: 33.6/100). 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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Nashua's air quality reflects southern New Hampshire's position in the Merrimack River valley, with vehicle emissions from the F.E. Everett Turnpike and surrounding New Hampshire road network the primary local source in this rapidly growing Boston metropolitan area suburb. The surrounding New Hampshire hills provide modest topographic variation, while the broader New England regional airshed contributes upwind urban and industrial sources from the Massachusetts and Connecticut corridor on prevailing southwesterly winds.
Today - 16 July | Pollution peaks at 12:00
AQI:
Fair
35.4/100
PM2.5 (fine particles):
Good
13.2/100
PM10 (coarse particles):
Good
11.4/100
NO2 (nitrogen dioxide):
Fair
21.6/100
O3 (ozone):
Fair
35.4/100
SO2 (sulfur dioxide):
Good
2.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.6/100
PM1 (ultrafine particles):
Good
5.9/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 10:00
AQI:
Fair
33.6/100
PM2.5 (fine particles):
Good
11.9/100
PM10 (coarse particles):
Good
9.3/100
NO2 (nitrogen dioxide):
Good
16.1/100
O3 (ozone):
Fair
33.6/100
SO2 (sulfur dioxide):
Good
3.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.3/100
PM1 (ultrafine particles):
Good
6.8/100
Pollen forecast in Nashua
View pollen forecastFrequently Asked Questions
Is air quality bad in Nashua right now?
On 16 July 2026, overall air quality in Nashua is fair. AQI is the main air quality indicator at 35.4/100. Pollution peaks around 12:00 PM (O3: 35.4/100).
Will air quality be worse tomorrow in Nashua?
On 17 July 2026, air quality conditions in Nashua will be similar to today, with AQI forecast at fair at 33.6/100. Pollution peaks around 10:00 AM (O3: 33.6/100).
When is air pollution at its worst in Nashua?
Air quality across Nashua rises and falls with the seasons, as the shoulder seasons bring the most consistently clean air of the year; by contrast, the combination of local heat and imported regional haze peaks during summer. Winter cold fronts tend to clear the air quickly, so extended pollution episodes are relatively uncommon.
Are air quality levels in Nashua 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