生态环境部：上半年全国生态环境总体改善

生态环境部在7月例行新闻发布会上通报了2026年上半年全国生态环境质量状况，总体呈现明显改善态势。1

空气质量方面成效显著。全国339个地级及以上城市PM2.5平均浓度为29.9微克/立方米，同比下降6.6%；PM10平均浓度为50微克/立方米，同比下降7.4%。1平均空气质量优良天数比例达82.8%，同比上升4.5个百分点，重度及以上污染天数比例为1%，同比下降0.5个百分点。1

地表水质量也取得实质进展。全国地表水Ⅰ—Ⅲ类水质比例为87.4%，同比上升3个百分点；劣Ⅴ类断面比例为0.9%，同比下降1.2个百分点。1在监测的145个重点湖库中，Ⅰ—Ⅲ类水质湖库占比达75.9%，同比上升3.5个百分点。1

The Ministry of Ecology and Environment reported at its July press briefing that the nation's ecological environment demonstrated overall improvement during the first half of 2026. 1

Air quality metrics reflected significant progress across major indicators. The average concentration of PM2.5 in 339 prefecture-level and above cities declined 6.6 percent year-on-year to 29.9 micrograms per cubic meter, while PM10 levels fell 7.4 percent to 50 micrograms per cubic meter. 1 The proportion of days with air quality rated as good or excellent reached 82.8 percent, up 4.5 percentage points compared to the same period last year, and the share of days with severe or worse pollution decreased to 1 percent, improving by 0.5 percentage points. 1

Water quality outcomes similarly showed marked improvement. Nationally, water bodies meeting Class I-III standards accounted for 87.4 percent of surface water, an increase of 3 percentage points year-on-year, while the proportion of inferior Class V water sections fell to 0.9 percent, down 1.2 percentage points. 1 Among 145 monitored key lakes and reservoirs, 75.9 percent achieved Class I-III water quality standards, representing a 3.5 percentage point rise from the previous year. 1