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
CAQI (Europe)
AQC (Australia)
AQHI (Canada)
AQI (China)
AQI (Netherlands)
AQI (US)
CAQI (Europe)
AQI (UK)
AQI (India)
Hertsmere District
Hertfordshire
2026-03-09 18:00
CAQI (Europe)
Medium
Pollutants
|
Pollens
PM2.5
μg/m³
38.9
PM10
μg/m³
48.9
NO2
μg/m³
34
Alder
9.0
Ragweed
0
Mugwort
0
Birch
0
Olive Tree
0
Grasses
0
Weather
℃
℃
℉
10℃
87%
7 kph
0 of 11
Historical Data
Hourly
Hourly
Daily
CAQI (Europe)
CAQI (Europe)
Allergy Risk
PM2.5
PM10
NO2
Alder
Ragweed
Mugwort
Birch
Olive Tree
Grasses
Places included
Aldenham Civil Parish
AQI 59
Aldenham East
AQI 59
Aldenham West
AQI 59
Bentley Heath & The Royds
AQI 59
Borehamwood Brookmeadow
AQI 59
Borehamwood Cowley Hill
AQI 58
Borehamwood Hillside
AQI 59
Borehamwood Kenilworth
AQI 59
Bushey Heath
AQI 59
Bushey North
AQI 59
Bushey Park
AQI 59
Bushey St James
AQI 59
Elstree
AQI 59
Elstree and Borehamwood
AQI 59
Potters Bar Furzefield
AQI 59
Potters Bar Oakmere
AQI 59
Potters Bar Parkfield
AQI 59
Shenley Civil Parish
AQI 59
South Mimms
AQI 59
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
Borehamwood Brookmeadow
AQI 59
Elstree
AQI 59
Aldenham East
AQI 59
Borehamwood Cowley Hill
AQI 58
Borehamwood
AQI 59
Aldenham West
AQI 59
Radlett
AQI 59
Borehamwood Hillside
AQI 59
Bushey Park
AQI 59
Borehamwood Kenilworth
AQI 59
Shenley
AQI 59
Air Matters © 2026