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MEP Releases Air Quality of Key Regions and 74 Cities in September and Q3 of 2013
2013-10-24
Article type: Translated

MEP official recently released air quality of key regions and 74 cities in September and Quarter 3 of 2013 including Beijing-Tianjin-Hebei Province, the Yangtze River Delta, the Pearl River Delta, municipalities, provincial capitals and cities separately listed on the state plan.

According to the official, the ratio of days with up-to-standard air quality among the 74 cities ranged between 13.3% and 100% with an average of 67.2%. Days with substandard air quality accounted for 32.8% on average, among which days of slight pollution made up 23.7%, intermediate pollution 6.0%, heavy pollution 2.9% and severe pollution 0.2%. In five cities such as Haikou, Lhasa, Zhoushan, Fuzhou and Yinchuan, all days were up to standard. In 24 cities including Harbin, Yancheng and Taizhou about 80% of the days were up to standard. The percentage of days with up-to-standard air quality in 26 cities including Changchun, Lianyungang and Yangzhou was between 50% and 80% and that in 19 cities was less than 50%. Polluted days were mostly caused by O3 and PM2.5, taking up 48.8% and 38.4% respectively. According to the assessment of air quality by comprehensive pollution index, the top ten cities with poor air quality in September were as follows: Xingtai, Shijiazhuang, Tangshan, Handan, Jinan, Hengshui, Baoding, Langfang, Tianjin and Xian. The top ten cities enjoying good air quality included Haikou, Zhoushan, Fuzhou, Lhasa, Yancheng, Lanzhou, Xiamen, Taizhou, Huizhou and Shanghai. In Beijing-Tianjin-Hebei Province, the days with up-to-standard air quality in 13 cities accounted for 13.3% -83.3%, averaging 40.9%. Days of substandard air quality accounted for 59.1% on average including 11.6% of the days suffering from heavy pollution and 1.3% severe pollution. PM2.5 and O3 were the major culprits of air pollution, resulting in 67.7% and 17.5% of pollution days respectively. Among the 25 cities in the Yangtze River Delta, the proportion of up-to-standard days stood at between 43.3% and 100% with an average of 78.4%. The average days with substandard air quality accounted for 21.6% which included 0.3% heavy pollution days. No severe air pollution occurred in the region. Air pollution in the Yangtze River Delta was mostly caused by O3, accounting for 75.8% of the total. PM2.5, the second major pollutant, led to 23.0% of the total pollution days. In the nine cities of the Pearl River Delta, around 46.7% -93.3% days met air quality standard, bringing the average ratio of up-to-standard days to 66.0%. Polluted days accounted for 34.0% on average including 1.5% of heavy pollution days. No severe pollution took place. The Pearl River Delta was mainly polluted by O3, which caused 98.9% of the total pollution days. PM2.5 was the second biggest pollutant, leading to 1.1% of the pollution days.

The monitoring results indicate that in the third quarter of 2013, the ratio of days with up-to-standard air quality of the 74 cities ranged between 15.2% and 100.0% with an average of 68.9%, up 6.4 percentage points compared with that of the second quarter. Polluted days accounted for 31.1% on average including 22.7% of days of slight pollution, 6.3% intermediate pollution, 2.0% heavy pollution and 0.1% severe pollution. The proportion of days posting heavy pollution or severe pollution dropped by 1.1 percentage points compared with that of the previous quarter. Most of the polluted days were caused by O3 and PM2.5, accounting for 65.2% and 28.1% of the total. Haikou, Lhasa, Yinchuan and Fuzhou experienced fine days throughout the quarter whereas the other 70 cities have all witnessed air pollution. Specifically, 25 cities including Kunming, Harbin and Guiyang had 80% or more days with up-to-standard air quality and 30 cities such as Huaian, Zhaoqing and Shenyang had fine days accounting for 50%-80%. The proportion of days with up-to-standard air quality was less than 50% in 15 cities. Assessed by comprehensive air quality index, the top ten cities with poor air quality in the third quarter included Xingtai, Shijiazhuang, Tangshan, Handan, Jinan, Hengshui, Tianjin, Baoding, Zhengzhou and Langfang. The top ten cities enjoying good air quality included Haikou, Zhoushan, Zhuhai, Fuzhou, Lhasa, Huizhou, Taizhou, Yinchuan, Lishui and Guiyang, among which air quality in Taizhou, Yinchuan, Lishui and Guiyang improved dramatically against that of the second quarter and air quality in Haikou, Zhoushan, Zhuhai, Huizhou, Lhasa and Fuzhou maintained stable.

In the 13 cities in Beijing-Tianjin-Hebei Province, days with up-to-standard air quality was between 16.3% and 71.7%, averaging 37.5%. The average rate of polluted days accounted for 62.5% including 5.9% of days of heavy pollution and 0.4% severe pollution. Most of the pollution days were caused by PM2.5 and O3, contributing to 52.2% and 38.0% of total pollution days. Compared with that of the second quarter, the average rate of days with up-to-standard air quality increased from 33.8% to 37.5%, up 3.7 percentage points.

The days with up-to-standard air quality in the 25 cities in the Yangtze River Delta took up 46.2% to 91.3%, averaging 73.5%. The average rate of polluted days stood at 26.5% including 1.3% of heavy pollution days. No severe pollution was observed in the region. O3 is the biggest pollutant in the region, contributing to 92.1% of total pollution days. PM2.5 was the second major pollutant, resulting in 7.8% of pollution days. Compared with that of the second quarter, the average rate of days with up-to-standard air quality rose from 63.1% to 73.5%, up 10.4 percentage points.

The nine cities of the Pearl River Delta Region saw 60.9%-92.4% of days with up-to-standard air quality with an average rate of 77.6%. The average rate of days with substandard air quality was 22.4% including 1.3% heavy pollution days. No severe air pollution occurred in the region. The region was mostly polluted by O3, leading to 99.5% of pollution days, followed by PM2.5, which caused 0.5% of the total pollution days. Compared with the second quarter, the average rate of days with up-to-standard air quality fell from 86.3% to 77.6%, down 8.7 percentage points.

(This English version is for your reference only.In case any discrepancy exists between the Chinese and English context, the Chinese version shall prevail.)
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