Michael Bull and Associates Ltd
PO Box 667
Kent TN9 9SD
If you wish to discuss any project or need further information, please contact Michael on
Or use the contact form on this website
Environment Agency H4 Odour Guidance - The document that details numerical odour standards for odour assessment.
2002 Draft of H4 - This was a much more extensive document and has some good background information.
Defra Local Authority Odour Guidance - useful guidance covering many aspects of odour assessment - note that Defra withdrew this guidance in September 2017 but no replacement has been issued.
IAQM Guidance on Odour and Planning - the only guidance relevant to planning - please see IAQM website.
Defra Guidance for Commerical Kitchens - contains the methodology used for a risk assessment of odours from restaurants/takeways - note that Defra withdrew this guidance in September 2017 but no replacement has been issued. An unofficial update was produced by EMAQ+.