Spelthorne Monitoring Results

An pdf icon annual summary of monitoring and results for the Borough in 2016 [843kb] can be downloaded. Previous years are available on request.

Raw and bias adjusted monitoring data can be downloaded as follows:

Operational sites

There are 3 continous monitoring stations in Spelthorne (Oaks Road, Stanwell; Sunbury Cross and Haslett Road, Upper Halliford) and over 40 diffusion tube monitoring locations. Data for the Oaks Road and Sunbury Cross stations are available from the Heathrow Airwatch website. Data for Haslett Road is available upon request.

pdf icon Oaks Road Continuous Monitor [NO2, PM10, PM2.5] [193kb] - see Heathrow AirWatch
excel icon Monthly NO2 diffusion tube data [115kb]
excel icon Annual NO2 diffusion tube data [57kb]

Closed sites

excel icon Sunbury Cross Continuous Monitor [NO2, PM10] [11Mb] (2007 to April 2012)

Other past air quality monitoring in the Borough includes:

  • a continuous monitoring station at junction 13 of the M25 motorway operated between 2004 to 2010 by Highways England;
  • three diffusion tube monitoring locations near motorways between 2008 and 2010 maintained by Highways England;
  • a one year diffusion tube survey in 2010 at about 20 locations near Heathrow; and
  • BTEX diffusion tube monitoring on Long Lane, Stanwell operated in 2010 and 2011.

Please contact the Pollution team if you would like data relating to these past surveys.