Please note this data may vary from that in our Annual Status Reports as no correction has been applied. Each year a co-location study takes place with each manufacturer of diffusion tubes locating their tubes adjacent to a sample of the Government's Automatic Urban and Rural (AURN) monitoring sites. This is a national network of air quality monitoring sites covering the whole of the UK. Based on this study a correction factor is produced for each type of diffusion tube. We then use this co-efficient to correct our data based on the diffusion tubes we use. These tubes are Gradko 20% triethylamine (TEA) in water.
Locations of 2020 Diffusion TubesAshbourne
Eyam and Stoney Middleton
Matlock Bath and Cromford
© Crown copyright [and database rights]  OS . Use of this data is subject to the following terms and conditions.
You are granted a non-exclusive, royalty free, revocable licence solely to view the Licensed Data for non-commercial purposes for the period during which Derbyshire Dales District Council makes it available. You are not permitted to copy, sub-license, distribute, sell or otherwise make available the Licensed Data to third parties in any form. Third party rights to enforce the terms of this licence shall be reserved to OS.
DataDiffusion tube data 2020
Diffusion tube data 2021