Spelthorne Borough Council

Providing Quality Services to the People of
Ashford, Laleham, Shepperton, Staines, Stanwell & Sunbury

Air quality - monitoring data

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Monitoring locations |


Monitoring locations

Raw monitoring data from the diffusion tube network

Oaks Road continuous monitoring station - BAA (external link)

Sunbury Cross continuous monitoring station - SBC (Pdf 107kb)

Summary of air quality monitoring in Spelthorne for 2007 (34KB)


Please Note:
All data is measured in µgm-3. The results consist of raw data only – data quality has not been applied.

Where no data was collected during a month due to loss of the tube, x is recorded in the data.


Bias adjustments

year bias adjustment figure
2003 1.24
2004 1.39
2005 1.44
2006 1.37
2007 1.06

The bias adjustments are to be used in conjunction with the air quality website:
http://www.uwe.ac.uk/aqm/review/ (external link)The section on bias adjustments can be found under R&A Support, and then in the second group down.



The expanding diffusion tube network

The diffusion tube network was significantly expanded in December 2003. Tubes 27 to 42 were added to provide a better coverage of the Borough.

In May 2004, tube 41 was moved from Knowle Green, Staines to Green Street, Sunbury.

Tube 42 is a travel blank. This tube is taken with the exposure tubes to and from the exposure sites and is kept under refrigerated conditions throughout the duration of the exposure period. This results from this tube should be 0.

Tubes 43, 44, 45 were added to the network in September 2007 and are triplicates at our continuous monitoring station in Sunbury.

Tube 40 (a duplicate at Knowle Green, Staines) was removed in February 2008.

Tubes 46 and 47 were added in February 2008 to improve coverage of the Borough and supplement the existing network of diffusion tubes.

The Highways Agency has three tubes from its national NO2 diffusion tube network within Spelthorne. Each of the chosen locations are on or near major roads and are positioned as close to residential properties as possible. The tube references are HA1, HA2, and HA3.

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