2021年，地级及以上城市空气质量优良天数比率为87.5%
China Daily
2021年，我国空气质量持续向好，地表水环境质量稳步改善。
China's environment further improved last year, according to an official report on the environmental conditions and the achievement of environmental protection objectives in 2021.
国务院关于2021年度环境状况和环境保护目标完成情况的报告显示，2021年，全国生态环境质量明显改善。
Last year, the percentage of days with good air quality was 87.5 percent in cities at and above the prefecture-level, up 0.5 percentage points year on year, the report said, which was submitted on Monday to the National People's Congress Standing Committee for review.
18日，十三届全国人大常委会第三十四次会议听取国务院关于2021年度环境状况和环境保护目标完成情况的报告。报告指出，2021年，全国空气质量持续向好。地级及以上城市空气质量优良天数比率为87.5%，同比上升0.5个百分点。
The average concentration of hazardous airborne particles PM2.5 was 30 micrograms per cubic meter, down 9.1 percent year on year, according to the report.
细颗粒物(PM2.5)平均浓度为30微克/立方米，同比下降9.1%。
The proportion of surface water at or above Grade III in the country's five-tier water quality system increased 1.5 percentage points year on year to 84.9 percent in 2021, the report said. Meanwhile, the proportion of surface water below Grade V, the lowest level, stood at 1.2 percent, the report added.
