Toggle navigation
Places
AQI (US)
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
Saint Albans District
AQI (US)
AQC (Australia)
AQHI (Canada)
AQI (China)
AQI (Netherlands)
AQI (US)
CAQI (Europe)
AQI (UK)
AQI (India)
Saint Albans District
Hertfordshire
2026-02-18 17:00
AQI (US)
Good
Pollutants
|
Pollens
PM2.5
μg/m³
8.4
PM10
μg/m³
14
Alder
3.3
Ragweed
0
Mugwort
0
Birch
0
Olive Tree
0
Grasses
0
Weather
℃
℃
℉
3℃
89%
33 kph
0 of 11
Historical Data
Hourly
Hourly
Daily
AQI (US)
AQI (US)
Allergy Risk
PM2.5
PM10
Alder
Ragweed
Mugwort
Birch
Olive Tree
Grasses
Places included
Batchwood
AQI 45
Bernards Heath
AQI 45
Clarence
AQI 45
Colney Heath
AQI 45
Cunningham
AQI 45
Harpenden
AQI 50
Harpenden East
AQI 50
Harpenden North & Rural
AQI 50
Harpenden Rural
AQI 50
Harpenden South
AQI 50
Harpenden West
AQI 50
Hill End
AQI 45
London Colney
AQI 45
Marshalswick East & Jersey Farm
AQI 45
Marshalswick West
AQI 45
Park Street
AQI 45
Redbourn
AQI 50
Redbourn Civil Parish
AQI 50
Saint Michael
AQI 45
Saint Stephen
AQI 45
Sandridge
AQI 45
Sandridge & Wheathampstead
AQI 50
Sopwell
AQI 45
St Albans
AQI 45
St Peters
AQI 45
St Stephen
AQI 45
Verulam
AQI 45
Wheathampstead
AQI 50
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
Harpenden South
AQI 50
Redbourn
AQI 50
Harpenden West
AQI 50
Batchwood
AQI 45
Bernards Heath
AQI 45
Harpenden North & Rural
AQI 50
Harpenden
AQI 50
Sandridge
AQI 45
Marshalswick West
AQI 45
Sandridge & Wheathampstead
AQI 50
Harpenden East
AQI 50
Air Matters © 2026