The first half of the city's air quality is better than the same period last year
- Details
- Category: Ningbo News
- Published: Friday, 06 July 2012 10:13
source 2012-7-6 9:15:15 Southeast Business
2012 the first half of 2011 over the same period pollutant concentrations compared
In the first half of this year, the city's four state-controlled atmosphere automatic monitoring of point (Pacific primary schools, the Sanjiang secondary schools, the Municipal Environmental Monitoring Center and the Long Race hospitals) and the continuous monitoring of air quality of the urban area of Ningbo, the monitoring indicators in addition to the conventional three (SO2 PM2.5, ozone, and of CO, NO2 and PM10), but also increased. According to the Environmental Monitoring Center, the first half of the city's air quality is better than the same period last year of PM2.5 mean decline over the same period last year.
Air quality is better than last year
In the first half of this year, the city API (Air Quality Index) conventional three --- that is, sulfur dioxide (SO2) dioxide (NO2) and respirable particulate matter (PM10), evaluation, better than last year.
City Ⅲ and above pollution days in the first half of this year, only nine days, with an excellent rate of 95.1%, an increase of 10.6 percent over the same period last year. For good air quality days, I level (excellent) to 46 days 127 days II level (good).
SO2, NO2 and PM10 average concentration of the first half of 0.024 milligrams per cubic meter, 0.044 mg and 0.08 mg of the main pollutant is particulate matter. Compared to last year, were down 25%, 18.5% and 25.2%.
Haze in the most public concern (visibility <10 km; relative humidity <80%) in the first half, a total of 43 days, accounted for 23.6% of the number of days.
In accordance with the evaluation of the PM2.5 standard, the first half of the city daily average PM2.5 concentration exceeded the number of days to 20 days (PM2.5 mean more than 75 micrograms per cubic meter), exceeded 11%. Among the most serious exceeded occurred on May 6, when the center of the environmental monitoring of the measured PM2.5 daily average concentration of 98 micrograms per cubic meter.
Why the improvement of air quality
Experts believe that compared with the same period last year, the city urban ambient air quality has improved, there are three main reasons.
First, look at the work from the city's environmental protection and pollution reduction. In recent years, the city to speed up the implementation of the ecological civilization construction work in the city center to comprehensively promote the second round of the National Environmental Protection Model City, creation of as the starting point vigorously to ban combustion zone construction, motor vehicle pollution control and dust control the main content of the Clean Air Initiative.
Should be noted that the emissions of major pollutants in the successful completion of the 11th Five-target on the basis of 2011 the city and the successful completion of the provincial government issued the annual emission reduction task, nitrogen oxides and sulfur dioxide reduction rate in the province. first and second. Increase the ecological and environmental protection to maintain and improve urban air quality is gradually revealed.
The second is from the city's economic development situation. In the first half of this year, as the economy improves the situation remains unclear, some companies underemployment, resulting in the city's total industrial coal declined certainly boost the role of atmospheric environment quality improvement.
From the first half of the weather conditions. In the first half of this year, especially in the spring and the rainy season, the city's rainfall is greater than the same period last year, rain erosion reduction of total particulate matter in the air have a certain effect.
2012, the first half of 2011 over the same period air quality contrast
Year / Level
Excellent rate of Ⅰ Ⅱ Ⅲ Ⅳ Ⅴ
2011 301,232,701 84.50%
2012 46 127 9 0 0 95.10%
