Monthly Diffusion Tube Readings

The results below show raw data, they are provisional and have not yet been annualised, bias adjusted or distance corrected, the data should be used for indicative purposes only. The adjusted results for this year will be used for the Annual Status Report for Air Quality (ASR) due to be completed in June 2025. The ASR for 2024 based on last year’s diffusion tube readings can be viewed below.

All periods of exposure are across four to five weeks, in accordance with DEFRA recommendations.

 

Monthly Readings 2025

Site NameLocationX OS Grid Ref (Easting)Y OS Grid Ref (Northing)NO2 Concentrations μg/m3
 JanFebMarAprMayJunJulAugSepOct/Nov*Dec
MV1West Street, Dorking51638814936622
MV2Vincent Lane CH, Dorking51627314887622
MV3Lonsdale Road, Dorking516869149797N/D
MV4A24 Beare Green51781914305523
MV5Osbrooks Lodge, A24 Horsham Road, Capel51722713868511
MV6Surrey County Council Highways Depot51721015720023
MV7A25 Reigate Road, Betchworth52020415057815
MV88 Russ Hill, Charlwood52341214058216
MV9Withey Meadows, Hookwood52691314236911
MV10Green Lane, Ashstead51771215674421
MV11Green Lane, Ashstead51780415675123
MV12Green Lane (Quarry Gardens)51767415684019
MV13Vincent Lane WS, Dorking51612014935728
MV14Pippbrook Council Offices, Dorking51703514980512
MV15Square About, Bookham51348315460025
MV16Cobham Road, Fetcham514677156557N/D
MV17Leret Road, Leatherhead51676315656323
MV18Deepdene Roundabout51724114984730
MV19Lowfield Heath Road52490914023119

n/d – no data available

* Exposure combined for Oct & Nov because of officer availability
S1R1C1