China's air and water cleaner as 2025 trends show

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The sky over Jinji Lake in Suzhou, east China's Jiangsu Province, November 11, 2025. /VCG

China's air quality and surface water quality continued to improve in 2025, the Ministry of Ecology and Environment said at a press conference on Wednesday.

In terms of air quality, the average PM2.5 concentration across 339 prefecture-level and above cities stood at 28.0 micrograms per cubic meter, down 4.4 percent year on year. Average PM10 concentration came in at 48 micrograms per cubic meter, a year-on-year decrease of 2.0 percent. The proportion of days with good air quality averaged 89.3 percent nationwide, excluding days with abnormal sandstorm-related exceedances – up 1.9 percentage points from the previous year. Days with heavy or more severe pollution accounted for 0.9 percent, unchanged year on year.

Surface water quality also showed steady improvement. Among 3,641 national monitoring sections for surface water, 91.4 percent recorded good quality, up 1.0 percentage point year on year. Monitoring data from 209 key lakes and reservoirs showed that 78.5 percent met good water quality standards, an increase of 1.4 percentage points year on year.

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