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

Chelmsford

Middlesex County, Massachusetts

2026-03-12 00:00
AQI (China)
Excellent
Pollutants|Pollens
PM10
μg/m³
28
PM2.5
μg/m³
14
O3
μg/m³
62.1
NO2
μg/m³
18.5
Weather
  • ℃
  • ℉
16℃
87%
7 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (China)
  • Pollen
  • PM10
  • PM2.5
  • O3
  • NO2
Places included
ChelmsfordNR
AQI 20
USEPA Region 1 Lab
AQI 20
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 28
Lowell
AQI 28
Westford
AQI 23
Carlisle
AQI 23
Billerica
AQI 23
Dracut
AQI 28
Tyngsborough
AQI 28
Tewksbury
AQI 23
Dunstable
AQI 28
Littleton
AQI 23
Acton
AQI 23