Green Book supplementary guidance: air quality

Supplementary guidance to the Green Book on valuing impacts on air quality.

This publication was withdrawn on

This document is now out of date and has been withdrawn.

Read the current guidance on valuing the effects of air quality.



The quality of the air impacts upon health and the environment.

The air quality impacts of any proposed policy, programme or project need to be understood and accounted for in appraisal.

This supplementary Green Book guidance should be used in conjunction with the Green Book when assessing proposals that lead to changes in UK air pollution.

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Published 10 May 2013
Last updated 14 January 2019 + show all updates
  1. Document withdrawn as the guidance has been replaced with a newer version at:
  2. First published.