The Seoul City government announced on July 23 ‘Report on Air Quality Assessment in Seoul in 2012’ and posted it on the website.
The number of days when air quality and visibility were ‘good’ increased by 21 days and 78 days, respectively, while the number of days with high concentration of fine dusts decreased by 71%.
The annual average concentration of fine dusts in Seoul in 2012 showed to be the lowest since the start of its observation in 1995.
The Seoul City government announced on July 23 the ‘Report on Air Quality Assessment in Seoul in 2012’ and posted it on its website for providing air environment information (cleanair.seoul.go.kr).
According to the report, the annual average concentration of fine dusts (PM-10) in Seoul in 2012 was 41㎍/㎥, the lowest level since the start of its observation in 1995. This shows a decrease for the fifth consecutive year since 2007 when it recorded 61㎍/㎥, and it represents nearly a half of the concentration in 1995, the first observation year when it showed 78㎍/㎥.
The number of days when concentration of fine dusts was lower than 30㎍/㎥, which is ideal for outing and outdoor activities, increased by 21 days from 109 days in 2011 to 130 days in 2012.
And the number of days when visibility was longer than 20 kilometers, allowing citizens to clearly see mountains on outskirts of Seoul, such as Mt. Gwanak and Mt. Dobong, from Mt. Nam was 274 days in 2012, an increase of 78 days from 2011.
The air quality in Seoul appeared to be improving year after year as the number of days when concentration of fine dusts exceeded 100㎍/㎥ decreased by 71% to 5 days in 2012 from 17 days in 2011.
Notably, the City authority did not issue any fine dust or yellow dust warning last year.
In addition to fine dusts, the concentration of other pollutants, such as nitrogen dioxide, sulfur dioxide and carbon monoxide, also showed to be gradually improving.
In 2012, the concentration of nitrogen dioxide met the atmosphere environmental standard, while that of sulfur dioxide and carbon monoxide showed to be one fourth and one 18th of the atmosphere environmental standard, respectively.
As a legally allowable criterion for gases or particulate matters that contaminate atmosphere, the atmosphere environmental standard is established to protect health of people and build pleasant environment.
Director Kang Hi-eun of Climate and Atmosphere Division at Seoul City government said, “The City government will manage air quality more tightly by implementing the ultrafine dust warning system starting in October this year. It will also further improve air quality by expanding range of management to nitrogen dioxide.”
The Seoul City government has been publishing the air quality assessment report every year based on objective data on air pollution collected by Public Health and Environment Research Institute, and it has been distributing them to public organizations, including National Archives and Seoul Library. This is the first time that it posted the report on the website.
Source : greenpostkorea