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Air quality data guidance

This guide describes the various data sources presented through our air quality tool and how they can be evaluated.

We are pleased to be able provide a set of online tools that allow you to view and analyse air quality data in Westminster from multiple sources.

On these pages you can find guidance on how best to interpret and understand this data. We also outline, amongst other things:

  • how data is collected and how often
  • where data is collected from
  • types of pollutants monitored

Published: 11 May 2023

Last updated: 3 October 2024