UCI Machine Learning Repository
Environmental Monitoring / Air Quality IoT
Jan 29, 2026
Beijing Multi-Site Air-Quality Data
Hourly air pollutant measurements (PM2.5, PM10, SO₂, NO₂, CO, O₃) and meteorological data from 12 nationally controlled monitoring sites in Beijing, collected from March 2013 to February 2017 (420,768 instances).[page:1][web:74]
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