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Beijing had just one day of heavy pollution in 2025, with annual PM2.5 levels dropping below 30 for the first time.
Beijing reported only one day of heavy air pollution in 2025, a 98.3% drop from 58 days in 2013, with its annual average PM2.5 level falling to 27.0 micrograms per cubic meter—below the 30-microgram threshold for the first time since records began.
This marks a major improvement from 2013’s 89.5 micrograms, driven by sustained efforts under the “blue sky defense war,” including industrial reforms, emissions controls, and regional cooperation.
The city now records good air quality on 348 days annually, signaling a transformative shift in air quality and public health.
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Beijing tuvo solo un día de fuerte contaminación en 2025, con niveles anuales de PM2.5 que cayeron por debajo de 30 por primera vez.