Diffusion Tubes for NO2 Monitoring: Practical Guidance for Laboratories and Users

The "NO2 Working Group Practical Guidance" document provides a framework for UK local authorities to assess and manage nitrogen dioxide (NO2) pollution, with a particular focus on the use of diffusion tubes for monitoring. It outlines best practices for deploying diffusion tubes, including site selection, preparation, and quality assurance procedures to ensure accurate and reliable NO2 measurements. This guidance supports local authorities in using diffusion tubes to identify pollution hotspots, evaluate air quality trends, and develop effective strategies for reducing NO2 levels to meet air quality objectives.