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
Hertfordshire
Hertsmere District
Radlett
CAQI (Europe)
AQC (Australia)
AQHI (Canada)
AQI (China)
AQI (Netherlands)
AQI (US)
CAQI (Europe)
AQI (UK)
AQI (India)
Radlett
Aldenham Civil Parish, Hertsmere District
2026-05-01 07:00
CAQI (Europe)
Very Low
Pollutants
|
Pollens
PM10
μg/m³
24
PM2.5
μg/m³
7
Birch
3.2
Alder
2.4
Grasses
1.8
Olive Tree
1.0
Ragweed
0
Mugwort
0
Weather
℃
℃
℉
15℃
48%
11 kph
2 of 11
Historical Data
Hourly
Hourly
Daily
CAQI (Europe)
CAQI (Europe)
Allergy Risk
PM10
PM2.5
Birch
Alder
Grasses
Olive Tree
Ragweed
Mugwort
Data Sources
http://www.polleninfo.org
http://uk-air.defra.gov.uk/
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
Radlett
AQI 24
Aldenham East
AQI 24
Aldenham West
AQI 24
Shenley
AQI 24
Park Street
AQI 24
Borehamwood Cowley Hill
AQI 24
Borehamwood Brookmeadow
AQI 24
London Colney
AQI 24
Meriden
AQI 24
Elstree
AQI 24
Borehamwood
AQI 24
Air Matters © 2026