1. North America
  2. United States
  3. Massachusetts
  4. Middlesex County
  5. Chelmsford

Chelmsford

Middlesex County, Massachusetts

2026-05-14 02:00
AQI (India)
Moderately polluted
Pollutants|Pollens
O3
μg/m³
105
NO2
μg/m³
24.6
PM10
μg/m³
12
PM2.5
μg/m³
5.7
Weather
  • ℃
  • ℉
13℃
77%
15 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (India)
  • Pollen
  • O3
  • NO2
  • PM10
  • PM2.5
Places included
ChelmsfordNR
AQI 31
USEPA Region 1 Lab
AQI 108
Data Sources
http://www.airnow.gov/

Get the App

Scan QR Code
Air Matters
Realtime broadcasting air quality information on your phone for more than 180 countries.

iPhone, iPad

Android

Cities Nearby

Chelmsford
AQI 108
Lowell
AQI 12
Westford
AQI 10
Carlisle
AQI 10
Billerica
AQI 14
Dracut
AQI 12
Tyngsborough
AQI 12
Tewksbury
AQI 10
Dunstable
AQI 12
Littleton
AQI 10
Acton
AQI 10