Air Quality in Harpenden, United Kingdom

Windy
13.5°C · 58.0% humidity
13.5°
Feels 13.5°
40
Good
Air quality is satisfactory. Enjoy outdoor activities.
Calibrated model

Nearby Monitoring Stations

AQI Forecast Calibrated
11 12am
11
11
40 3am
32
15
11 6am
8
5
4 9am
3
2
1 12pm
1
1
1 3pm
0
0
0 6pm
0
0
0 9pm
0
0
Station readings
4
9
12
CAMS model adj -43
54
54
54
54
54
34
27
25
25
25
25
27
27
27
27
27
27
25
25
25
25
25
25
25
AD 728×90

Air Quality Index Trend

46h · 1 stn

Harpenden's air quality is shaped by traffic emissions and residential heating. Pollution levels tend to peak during winter months when cold air traps emissions close to ground level.

58.0%
Humidity
56.8 km/h
Wind ENE
1015.6 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
40
9.53 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Harpenden?

Temperature & Precipitation

PM2.5 Trend

46h · 1 station
PM2.59.53 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Both models agree Avg diff: 3.0°C

Where are air quality stations near Harpenden?

12
Great Missenden
27.5 km PM2.5: 2.9 µg/m³ PM10: 2.9 µg/m³
50
Haringey Roadside, United Kingdom
31.3 km PM2.5: 12.0 µg/m³
8
Haringey Roadside, United Kingdom
31.3 km PM2.5: 1.9 µg/m³

What cities are near Harpenden?

50 St Albans 26 Luton 8 Hemel Hempstead 38 Welwyn Garden City 51 Hatfield 8 Dunstable 40 Stevenage 46 North Watford 39 Hitchin 8 Berkhamsted
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-07-22T02:16 UTC.