OpenAQ is currently collecting data in 65 different countries and always seeking to add more to their pool of air quality data. They aggregate PM2.5, PM10, ozone (O3), sulphur dioxide (SO2), nitrogen dioxide (NO2), carbon monoxide (CO), and black carbon (BC) from real-time government and research grade sources.
65 Countries, from Afghanistan to Viet Nam. Including 85,597,270 measurements from the United States, 7,972,212 from Canada, and 14,363,193 from the United Kingdom
2018-Present
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