Shenzhen One Among Nine Cities that Passed New Air Quality Standards
For the first half of this year Shenzhen is nine among 161 Chinese cities that has reached the goal of the new and stricter air quality monitoring standard that was implemented by the Ministry of Environmental Protection. The nine cities are Zhoushan, Zhanjiang, Yunfu, Beihai, Sanya, Zhuhai, Lhasa and Shenzhen.
All of these cities have reached the standards and is around 6 percent of the 161 cities have passed the air quality standard that is deemed safe under the new stricter standards. The new standards are placed into use at the beginning of the year and at 161 cities across China.
The air quality in Shenzhen is at the excellent or safe level as 171 out of 181 days in the first half of the year was recorded. And of five of the major pollutants that are monitored the only average ozone density increased slightly compared to the same period last year. The city has recorded a PM2.5 density of an average 33 mg per cubic meters in the first six months which is significantly lower compared to a year ago. This figure is also the third lowest among the 74 major cities with air qualities that are being monitored by the Ministry of Environmental Protection.
In February 2012, China has issued a new air quality monitoring standard which includes monitoring carbon dioxide, the ozone layer and PM 2.5 particles in which they added PM10, nitrogen dioxide and sulfur dioxide.