As of 2015, in 338 cities on county level and above, several key air quality standards such as sulphur dioxide levels, nitrogen oxide levels and PM10 levels are measured on an hourly basis and then published regularly.
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Nitrogen dioxide level in Chinese cities on county level and above 2011-2015
This statistic shows the nitrogen dioxide level in cities in China from 2011 to 2015. In 2011, the nitrogen dioxide level in Chinese environmental protection cities had reached milligrams per cubic meter.
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Ministry of Ecology and Environment (China). (May 20, 2016). Average nitrogen dioxide level in cities on county level and above in China from 2011 to 2015 (in microgram per cubic meter) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 25, 2026, from /statistics/301596/china-nitrogen-dioxide-level-in-key-environmental-protection-cities/
Ministry of Ecology and Environment (China). "Average nitrogen dioxide level in cities on county level and above in China from 2011 to 2015 (in microgram per cubic meter)." Chart. May 20, 2016. ÌÇÐÄÆƽâ°æ. Accessed July 25, 2026. /statistics/301596/china-nitrogen-dioxide-level-in-key-environmental-protection-cities/
Ministry of Ecology and Environment (China). (2016). Average nitrogen dioxide level in cities on county level and above in China from 2011 to 2015 (in microgram per cubic meter). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 25, 2026. /statistics/301596/china-nitrogen-dioxide-level-in-key-environmental-protection-cities/
Ministry of Ecology and Environment (China). "Average Nitrogen Dioxide Level in Cities on County Level and above in China from 2011 to 2015 (in Microgram per Cubic Meter)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 20 May 2016, /statistics/301596/china-nitrogen-dioxide-level-in-key-environmental-protection-cities/
Ministry of Ecology and Environment (China), Average nitrogen dioxide level in cities on county level and above in China from 2011 to 2015 (in microgram per cubic meter) ÌÇÐÄÆƽâ°æ, /statistics/301596/china-nitrogen-dioxide-level-in-key-environmental-protection-cities/ (last visited July 25, 2026)
Average nitrogen dioxide level in cities on county level and above in China from 2011 to 2015 (in microgram per cubic meter) [Graph], Ministry of Ecology and Environment (China), May 20, 2016. [Online]. Available: /statistics/301596/china-nitrogen-dioxide-level-in-key-environmental-protection-cities/
