Worst air pollution Worcester, today and tomorrow
Today (16 July): Air quality in Worcester is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 PM (O3: 36.3/100).
Tomorrow (17 July 2026): Air quality in Worcester is fair. All pollutants stay as today. Pollution peaks around 1:00 PM (O3: 38.8/100). 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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Worcester's air quality in Massachusetts reflects the central New England inland position, with vehicle emissions from I-290 and I-395 and upwind sources from the Boston corridor contributing to moderate readings. The surrounding Worcester Hills provide modest topographic variation, while the lack of direct coastal ventilation makes Worcester more susceptible than coastal cities to summer ozone accumulation from regional northeastern US sources.
Today - 16 July | Pollution peaks at 13:00
AQI:
Fair
36.3/100
PM2.5 (fine particles):
Good
15.3/100
PM10 (coarse particles):
Good
12.3/100
NO2 (nitrogen dioxide):
Good
14.7/100
O3 (ozone):
Fair
36.3/100
SO2 (sulfur dioxide):
Good
2.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.1/100
PM1 (ultrafine particles):
Good
6.8/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 13:00
AQI:
Fair
38.8/100
PM2.5 (fine particles):
Good
12.7/100
PM10 (coarse particles):
Good
10.3/100
NO2 (nitrogen dioxide):
Good
17.0/100
O3 (ozone):
Fair
38.8/100
SO2 (sulfur dioxide):
Good
2.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.0/100
PM1 (ultrafine particles):
Good
7.5/100
Pollen forecast in Worcester
View pollen forecastFrequently Asked Questions
Is air quality bad in Worcester right now?
On 16 July 2026, overall air quality in Worcester is fair. AQI is the main air quality indicator at 36.3/100. Pollution peaks around 1:00 PM (O3: 36.3/100).
Will air quality be worse tomorrow in Worcester?
On 17 July 2026, air quality conditions in Worcester will be similar to today, with AQI forecast at fair at 38.8/100. Pollution peaks around 1:00 PM (O3: 38.8/100).
When is air pollution at its worst in Worcester?
Worcester sees air quality change through the year. Typically, spring and autumn generally bring the cleanest air, helped by more active weather patterns, while 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 Worcester 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