China News Service, July 16, according to the official website of the Ministry of Ecology and Environment, the Ministry of Ecology and Environment informed the media on June 16th and January-June of 2020 of the state of surface water and ambient air quality. From January to June, in 1940 national surface water assessment sections, the proportion of sections with good water quality (Class I-III) was 80.1%, up 5.6 percentage points year-on-year; the ratio of inferior Class V sections was 1.1%, down 3.2 percentage points year-on-year. From January to June, the proportion of average good days in 337 prefecture-level cities and above was 85.0%, an increase of 4.9 percentage points year-on-year; PM2.5 concentration was 36 μg/m3, a decrease of 10.0% year-on-year
In June, among the 1940 national surface water assessment sections, the proportion of sections with good water quality (category I-III) was 71.4%, an increase of 0.6 percentage points year-on-year; the ratio of inferior grade V sections was 2.5%, a decrease of 2.9 percentage points year-on-year. The main pollution indicators are chemical oxygen demand, permanganate index and total phosphorus.
Proportion of national surface water quality categories in June 2020
From January to June, in 1940 national surface water assessment sections, the proportion of sections with good water quality (Class I-III) was 80.1%, up 5.6 percentage points year-on-year; the ratio of inferior Class V sections was 1.1%, down 3.2 percentage points year-on-year. The main pollution indicators are chemical oxygen demand, total phosphorus and permanganate index.
Proportion of national surface water quality categories from January to June 2020
In June, the proportion of water quality in the seven major river basins including the Yangtze River, the Yellow River, the Pearl River, the Songhua River, the Huaihe River, the Haihe River, and the Liaohe River, and the northwestern rivers, southwestern rivers, and Zhejiang-Fujian rivers was 7.1%, up 1.4 percentage points year-on-year; The inferior category V was 1.9%, a decrease of 3.2 percentage points year-on-year. The main pollution indicators are chemical oxygen demand, permanganate index and total phosphorus. Among them, the water quality of the northwest and southwest rivers is superior, the water quality of the Yangtze River Basin, Zhejiang and Fujian Rivers, the Pearl River Basin and the Yellow River Basin is good, and the Songhua River, Liaohe River, Huaihe River and Haihe River Basin are lightly polluted.
Proportion of water quality categories in the seven major river basins, southwest and northwest rivers, and rivers in Zhejiang and Fujian in June 2020
From January to June, the proportion of water quality in the seven major river basins including the Yangtze River, the Yellow River, the Pearl River, the Songhua River, the Huaihe River, the Haihe River, and the Liaohe River, as well as the northwestern rivers, southwestern rivers, and Zhejiang-Fujian Rivers, Grades I-III, was 83.8%, up 5.9% year-on-year Percentage point; the inferior category V is 0.7%, a year-on-year decrease of 3.8 percentage points. The main pollution indicators are chemical oxygen demand, permanganate index and five-day biochemical oxygen demand. Among them, the water quality in the northwestern rivers, the Yangtze River Basin, Zhejiang-Fujian Rivers, southwestern rivers and the Pearl River Basin is superior, the water quality in the Yellow River and Songhua River Basins is good, and the Huaihe, Haihe and Liaohe River Basins are lightly polluted.
Proportion of water quality in the seven major river basins and the southwest and northwest rivers and rivers in Zhejiang and Fujian from January to June 2020
In June, among the 112 key lakes (reservoirs) monitored, the number of Class I-III water quality lakes (reservoirs) accounted for 71.4%, an increase of 2.6 percentage points year-on-year; the number of inferior Class V water quality lakes (reservoirs) accounted for 7.1%, a year-on-year decrease of 1.2 percentage points. The main pollution indicators are total phosphorus, chemical oxygen demand and permanganate index. Of the 97 key lakes (reservoirs) monitoring the eutrophication status, 6 lakes (reservoirs) were moderately eutrophic, accounting for 6.2%; 19 lakes (reservoirs) were mildly eutrophic, accounting for 19.6%; the rest The lake (bank) is not eutrophic. Among them, Taihu Lake is light pollution and light eutrophication, the main pollution index is total phosphorus; Chaohu Lake has good water quality and light eutrophication; Dianchi Lake is heavy pollution, moderate eutrophication, the main pollution indicators are chemical oxygen demand, total phosphorus And permanganate index; the water quality of Erhai Lake is good and mesotrophic; the water quality of Danjiangkou Reservoir is excellent and mesotrophic; Baiyangdian is lightly polluted and slightly eutrophic, and the main pollution indicators are chemical oxygen demand, permanganate index and total phosphorus. Compared with the same period of last year, the water quality of Chaohu Lake has improved, the water quality of Dianchi Lake has declined, and the water quality of Taihu Lake, Erhai Lake, Danjiangkou Reservoir and Baiyangdian Lake has not changed significantly; the nutritional status of Danjiangkou Reservoir has improved, and that of Taihu Lake, Chaohu Lake, Dianchi Lake, Erhai Lake and Baiyangdian Lake has improved. There was no obvious change.
From January to June, among the 112 key lakes (reservoirs) monitored, the number of Class I-III water quality lakes (reservoirs) accounted for 75.9%, up 9.8 percentage points year-on-year; the number of inferior Class V water quality lakes (reservoirs) accounted for The ratio was 5.4%, a year-on-year decrease of 1.9 percentage points. The main pollution indicators are total phosphorus, chemical oxygen demand and permanganate index. Of the 109 key lakes (reservoirs) monitoring the eutrophication status, 5 lakes (reservoirs) were moderately eutrophic, accounting for 4.6%; 19 lakes (reservoirs) were mildly eutrophic, accounting for 17.4%; the rest The lake (bank) is not eutrophic. Among them, Taihu Lake is light pollution and light eutrophication, the main pollution index is total phosphorus; Chaohu Lake has good water quality and light eutrophication; Dianchi Lake is moderate pollution, moderate eutrophication, the main pollution indicators are chemical oxygen demand and total Phosphorus; the water quality of Erhai Lake and Danjiangkou Reservoir is excellent and mesotrophic; Baiyangdian is lightly polluted and slightly eutrophic, and the main pollution index is chemical oxygen demand. Compared with the same period of last year, the water quality of Chaohu Lake and Erhai Lake has improved, and the water quality of Dianchi Lake has declined. There is no significant change in the water quality of Taihu Lake, Danjiangkou Reservoir and Baiyangdian Lake. The nutritional status of Dianchi Lake has declined, but none of Taihu Lake, Chaohu Lake, Erhai Lake, Danjiangkou Reservoir, and Baiyangdian Lake. obvious change.
The participating prefecture-level cities at the national level and above cover 2,050 state-controlled cross-sections (of which 1940 are national surface water assessment cross-sections and 110 are sea control cross-sections). In June, among the cities at prefecture level and above, 30 cities including Laibin, Guilin and Zhangye had relatively good surface water quality (from 1st to 30th), and 30 cities including Cangzhou, Fuxin and Chifeng The surface water quality of urban national surface water assessment is relatively poor (from the last to the last 30); from January to June, among the cities of prefecture level and above in the country, 30 cities including Zhangye, Jinchang and Liuzhou have surface water The water environment quality of the cross-sectional assessment is relatively good (from 1st to 30th), and the surface water quality of the surface water assessment of 30 cities and counties in Tongchuan, Cangzhou and Xingtai is relatively poor (from the last to the 30th) ); Yingkou, Lvliang and Liaoyuan have relatively good changes in surface water quality in the surface water assessment section (from 1st to 30th), and surface water assessment in 30 cities including Tongchuan, Daqing and Chifeng The changes in environmental quality are relatively poor (from the bottom one to the bottom thirty).
In June, the proportion of average good days in 337 prefecture-level cities and above was 85.1%, an increase of 5.9 percentage points year-on-year; PM2.5 concentration was 19 micrograms/cubic meter, down 13.6 percent year-on-year; PM10 concentration was 40 micrograms/cubic meter. Year-on-year decrease of 7.0%; O3 concentration was 143 micrograms/cubic meter, a year-on-year decrease of 8.3 percent; SO2 concentration was 8 micrograms/cubic meter, a decrease of 11.1 percent year-on-year; NO2 concentration was 18 micrograms/cubic meter, a decrease of 10.0 percent year-on-year; CO concentration was 0.8 mg/m3, a year-on-year decrease of 11.1%.
From January to June, the proportion of average good days in 337 prefecture-level cities and above was 85.0%, up 4.9 percentage points year-on-year; PM2.5 concentration was 36 μg/m3, down 10.0% year-on-year; PM10 concentration was 59 μg/m3 Rice, down 14.5% year-on-year; O3 concentration was 141 μg/m3, down 1.4% year-on-year; SO2 concentration was 10 μg/m3, down 16.7% year-on-year; NO2 concentration was 23 μg/m3, down 14.8% year-on-year; CO The concentration was 1.3 mg/m3, a year-on-year decrease of 13.3%.
Proportion of days in various cities of 337 prefecture-level and above nationwide from January to June 2020
From January to June 2020, the concentration of six indicators and the year-on-year change in 337 cities at the prefecture level and above
In June, the average ratio of good days in the "2+26" cities in Beijing, Tianjin, Hebei and surrounding areas was 36.9%, up 16.2 percentage points year-on-year; the PM2.5 concentration was 35 micrograms/cubic meter, down 2.8% year-on-year. From January to June, the average good days ratio was 59.7%, an increase of 12.6 percentage points year-on-year; the PM2.5 concentration was 55 micrograms/cubic meter, a decrease of 16.7% year-on-year.
The proportion of excellent days in Beijing in June was 33.3%, a year-on-year decrease of 3.4 percentage points; PM2.5 concentration was 32 micrograms/cubic meter, a year-on-year decrease of 17.9%. From January to June, the proportion of good days was 71.4%, up 9.0 percentage points year-on-year; the PM2.5 concentration was 43 micrograms/cubic meter, down 8.5% year-on-year.
In 41 cities in the Yangtze River Delta region, the average number of good days in June was 84.2%, up 19.1 percentage points year-on-year; the PM2.5 concentration was 20 μg/m3, down 25.9% year-on-year. From January to June, the average ratio of good days was 84.1%, up 10.5 percentage points year-on-year; the PM2.5 concentration was 37 micrograms/cubic meter, down 21.3% year-on-year.
The average fine days in June in 11 cities in Fenwei Plain were 60.9%, up 9.7 percentage points year-on-year; the PM2.5 concentration was 28 μg/m3, which was flat year-on-year. From January to June, the average good days ratio was 66.5%, an increase of 12.1 percentage points year-on-year; the PM2.5 concentration was 53 μg/m3, a decrease of 18.5% year-on-year.
In June, among the 168 key cities, cities such as Tangshan, Taiyuan, and Jincheng had relatively poor air quality (from last to last 20th place); cities such as Zhuhai, Zhongshan, and Shenzhen had relatively good air quality (from 1st to 20th).
From January to June, among the 168 key cities, cities such as Shijiazhuang, Anyang and Taiyuan had relatively poor air quality (from last to last 20th place); cities such as Haikou, Lhasa and Zhuhai had relatively good air quality (From 1st to 20th).
From January to June, among the 168 key cities, Baotou, Hohhot, Harbin and other cities have relatively poor air quality improvement (from last to last 20th place); Yichang, Chizhou, Jingmen and other cities have improved air quality The range is relatively good (from 1st to tied for 19th).