February 9, the provincial Department of Environmental Protection issued in 2011 the province's environmental quality: the days of good year-on-year increase in urban air, acid rain pollution has improved, remained stable overall river water quality, urban centralized drinking water source water quality continues to improve.
Urban environment, improving air quality. In 2011, the province's 24 provincial control of urban air fine days average 357 days, an increase of 0.96%. There are 23 cities where air quality is better than the national secondary standard by two or more than the previous year.
24 provinces controlled urban concentrations of sulfur dioxide-year average of 0.037 mg / cu m, down to 0.001 mg / cubic meter; annual average nitrogen dioxide concentration of 0.032 mg / cu m, up flat; annual average respirable particulate matter concentration of 0.062 mg / cubic meters, down to 0.005 mg / cu m.
Acid rain pollution has improved. In 2011, 24 provinces controlled urban precipitation ph annual average range between 4.24 to 7.38, acid rain frequency of 30.6%. Acid rain pollution in the province has improved, precipitation acidity and acidity weakened, acid rain to decline in the proportion of total rainfall frequency and amount of acid rain.
The river water quality remained stable overall. Yangtze River and the Jinsha River and Jialing River and most of the tributary water quality is excellent. 139 provinces controlled sections of the standard rate of 66.91%. 6 out of Sichuan section of standards, which Jialing clear Pingchen Drainage River Race Ryugo, the Yulin unitary Beach, Fujiang old pool ⅱ water quality; the Yangtze Shaxikou, Joan River's Daan ⅲ Grade .
Major urban centralized drinking water source water quality continued to improve the monitoring sections (or point) compliance rate has increased year on year. Centralized drinking water sources in 77 cities across the province to section, the annual water quality standards accounted for 77.9%, an increase of 5.6%.
2011, the average equivalent sound level of the province's urban regional environmental noise was 52.7 decibels, an increase of 0.2 db. The province's average road traffic noise equivalent sound level of 66.8 dB, an increase of 0.5 db. Source: Sichuan Daily
