Worst air pollution Hartford, today and tomorrow
Today (16 July): Air quality in Hartford 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: 36.7/100).
Tomorrow (17 July 2026): Air quality in Hartford is fair. All pollutants stay as today. Pollution peaks around 1:00 PM (O3: 37.6/100). 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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Hartford's air quality reflects the Connecticut River valley's position in the northeastern US industrial corridor, with vehicle emissions from I-84 and I-91 combining with upwind New York and New Jersey sources to elevate summer ozone and PM2.5. The river valley provides some natural ventilation, but the broader New England regional airshed means background pollution levels exceed those of more isolated US cities.
Today - 16 July | Pollution peaks at 12:00
AQI:
Fair
36.7/100
PM2.5 (fine particles):
Good
12.7/100
PM10 (coarse particles):
Good
13.1/100
NO2 (nitrogen dioxide):
Fair
27.1/100
O3 (ozone):
Fair
36.7/100
SO2 (sulfur dioxide):
Good
3.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.5/100
PM1 (ultrafine particles):
Good
8.5/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 13:00
AQI:
Fair
37.6/100
PM2.5 (fine particles):
Good
8.2/100
PM10 (coarse particles):
Good
3.3/100
NO2 (nitrogen dioxide):
Fair
30.4/100
O3 (ozone):
Fair
37.6/100
SO2 (sulfur dioxide):
Good
1.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.2/100
PM1 (ultrafine particles):
Good
6.8/100
Pollen forecast in Hartford
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Hartford
Frequently Asked Questions
Is air quality bad in Hartford right now?
On 16 July 2026, overall air quality in Hartford is fair. AQI is the main air quality indicator at 36.7/100. Pollution peaks around 12:00 PM (O3: 36.7/100).
Will air quality be worse tomorrow in Hartford?
On 17 July 2026, air quality conditions in Hartford will be similar to today, with AQI forecast at fair at 37.6/100. Pollution peaks around 1:00 PM (O3: 37.6/100).
When is air pollution at its worst in Hartford?
Hartford sees air quality change through the year — frequent frontal systems in spring and fall usually keep the air cleanest then, whereas hot, humid summer days bring the highest ozone risk, often worsened by pollution transported in from other regions. Coastal sea breezes can offer some relief from inland summer ozone buildup.
Are air quality levels in Hartford 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