Data fully processed in accordance with the project's final Quality Assurance and Quality Control (QA/QC) procedures. Data is GMT hour ending. Missing data is indicated with the value -999. Download other data sets »

Click on the map above to see average pollution levels in London.

There is an invisible threat to Londoners’ health: Air pollution likely contributes to thousands of early deaths in London every year.

Urban residents need better information on pollution’s health effects, as well as readily available — and understandable — air pollution data and analysis. That’s why the Breathe London pilot project mapped and measured pollution across the capital, led for two years by Environmental Defense Fund Europe and launched in partnership with the Mayor of London and leading science and technology experts.

With more than 100 lower-cost sensor pods and specially-equipped Google Street View cars, Breathe London complemented and expanded upon London’s existing monitoring networks. The project aimed to help people better understand their local air quality and support cities around the world with future monitoring initiatives. EDF developed the Breathe London Blueprint for global cities, which includes both a guide for city-level decision-makers and a more detailed Technical Report.

Download measured and modelled data from this project »


  • COVID lockdown slashed one pollutant

    Our analysis found NO2 pollution was 40% lower than expected across London during the initial COVID-19 lockdown. But how do we know about pollution that didn’t happen? We used a machine learning model to predict what concentration of NO2 would have been if lockdown restrictions had not come into effect. Learn more here