Street by street: How we’re mapping air quality in Europe

Since 2015, dozens of Street View cars outfitted with pollution sensors have been cruising the roads to track air quality in cities all over the world — from Oakland to Sydney. Over the past six years, these cars have collected more than 100 million street-by-street air quality measurements, all for Project Air View — our effort to bring detailed air quality maps to scientists, policymakers and everyday people. These hyperlocal air quality measurements are helping governments and communities make more informed choices about changes that can help city residents breathe cleaner air.

In celebration of EU Green Week next week, we are sharing a new air quality map for Copenhagen and recently started working with the City of Dublin to collect air quality measurements with Aclima technology in our first-ever, all-electric Street View car. This is all part of Google’s Environmental Insights Explorer (EIE), our free tool that provides thousands of cities with actionable data and insights to reduce their emissions.

Capturing air quality in Copenhagen

In 2018, we started mapping hyperlocal air quality in Copenhagen, working closely with the City of Copenhagen and Utrecht University, in collaboration with Aarhus University. The map — which is already being put to use —  includes measurements of nitrogen dioxide (NO2), black carbon, and ultrafine particles. Through mapping street-by-street air quality we found that Copenhagen’s major access roads have nearly three times more ultrafine particles and nitrogen dioxide (NO2) and five times higher black carbon levels when compared to less trafficked residential areas.