Review of NOx critical levels - online workshops

The ICP Vegetation Coordination Centre is performing a review of NOx critical levels in relation to vegetation. We are investigating whether there is any evidence to justify changing the current levels, and we will consider the scope of any application.

    We held the first online workshop on the ICP Vegetation review of NOx critical levels on Tuesday 24th May 2022.

    During the workshop, we considered what data and evidence are available for NOx critical levels, met review participants, and defined a workplan.

    See the attachments at the bottom of this page for the minutes and more detailed report from the workshop.

    These documents contain details in relation to active working groups on pollutant mapping, and evidence extraction and analysis. If you would like to join these groups, please don’t hesitate to contact Mike Perring ( as soon as possible.

    Findings from these working groups will be published in due course.

    There will be a follow-up online workshop to discuss the findings so far on 24th January 2023.


    Event date: 

    Tuesday, January 24, 2023

    PDF attachment: