Page Last Updated: 16/10/2017

The FAQ pages are currently undergoing consolidation into new documents. From time to time this page will be updated to indicate where relevant information contained within the FAQs has been moved to.

Bookmarked links to individual FAQ pages should be updated to follow the new guidance locations.

FAQSort by TitleKeywordsPublished Date (sort)
93 Where there are multiple boilers/furnaces which are individually below the Clean Air Act threshold of 366.4 kilowatts and are served by several chimneys, how should we check whether or not exceedences of the NO2 objective are likely?Industrial Pollutant Boiler Clean Air Act Multiple NO2 NOX Nitrogen 13/10/2017
5 Measured nitrogen oxides (NOx) and/or nitrogen dioxide (NO2) concentrations in my local authority area do not appear to be declining in line with national forecasts. Should I take this into account in my Review and Assessment work?Pollutant Diffusion Nitrogen NOx NO2 trends 01/09/2010
111What is the Supplementary Assistance: Chimney Height Calculation Spreadsheet?Modelling Industrial Pollutant SO2 Stack Chimney Height 01/03/2010

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