Toggle navigation
Places
CAQI (Europe)
AQC (Australia)
AQHI (Canada)
AQI (China)
AQI (Netherlands)
AQI (US)
CAQI (Europe)
AQI (UK)
AQI (India)
English
Français
Deutsch
日本語
한국어
简体中文
繁體中文
Europe
United Kingdom
England
Essex
Chelmsford
Great and Little Leighs
CAQI (Europe)
AQC (Australia)
AQHI (Canada)
AQI (China)
AQI (Netherlands)
AQI (US)
CAQI (Europe)
AQI (UK)
AQI (India)
Great and Little Leighs
Chelmsford
2026-09-30 10:00
CAQI (Europe)
Low
Pollutants
|
Pollens
PM2.5
μg/m³
25
PM10
μg/m³
30.6
O3
μg/m³
49.3
NO2
μg/m³
11.1
SO2
μg/m³
1.9
Grasses
0.6
Mugwort
0.4
Alder
0
Ragweed
0
Birch
0
Olive Tree
0
Weather
℃
℃
℉
21℃
82%
28 kph
0 of 11
Historical Data
Hourly
Hourly
Daily
CAQI (Europe)
CAQI (Europe)
Allergy Risk
PM2.5
PM10
O3
NO2
SO2
Grasses
Mugwort
Alder
Ragweed
Birch
Olive Tree
Get the App
Scan QR Code
Air Matters
Realtime broadcasting air quality information on your phone for more than 180 countries.
iPhone, iPad
Android
Scan QR Code to Download App
iOS
Google Play
Download APK
Cities Nearby
Boreham and The Leighs
AQI 42
Great Notley
AQI 39
Great Notley & Black Notley
AQI 39
Broomfield and The Walthams
AQI 44
Little Waltham
AQI 44
Black Notley
AQI 38
Felsted & Stebbing
AQI 39
Rayne
AQI 39
Braintree West
AQI 39
Braintree South
AQI 38
Hatfield Peverel & Terling
AQI 35
Air Matters © 2026