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The author:(作者)delvpublished in(发表于) 2014/1/2 8:33:15 2013 heavy pollution in Beijing was 58 days， an average of 1 day a week
CNS, Beijing, January 2 (reporters Yin Li and Kan Feng)-it was informed today by the Beijing municipal environmental protection Bureau, 2013 Beijing's air quality reached 176 days, heavy pollution days a total of 58 days, exceeding the primary pollutants pollution days for PM2.5.
2013 Beijing start at 35 monitoring PM2.5 air quality monitoring station 5 of polluting substances such as "year one", Beijing issued the clean air action plan from 2013 to 2017. Beijing municipal environmental protection Bureau held a press conference today, informed throughout 2013 Beijing's air quality conditions.
Introduce Zhang Dawei, Director of Beijing municipal environmental protection Bureau environmental monitoring center, air quality situation: between one and six days respectively, 41, 84, 47, 45, and 13 days.
Dawei Zhang introduced in 2013, grade I, grade II days of the year, Beijing fine day a total of 176 days, 48.2%. Five-, six-level heavy pollution days add up to a total of 58 days, 15.9%. "That is to say, once every 6-7 days of heavy pollution days, the frequency is higher. ”
According to reports, exceeded the primary pollutants pollution days for PM2.5, 77.8%, ozone, 20.1%, mainly in May-September summer concentrated high concentration periods from early afternoon to early evening, and other pollutants (PM10, NO2, 2.1% per cent). (End text)
(Original title: 2013 Beijing heavy pollution days one day a week on average 58 days of pollution)
中新网北京1月2日电(记者 尹力 阚枫) 据北京市环保局今日通报，2013年北京空气质量优良天数达176天，重污染天累计58天，超标污染日中的首要污染物为PM2.5。
2013年是北京开始在35个空气质量监测站监测PM2.5等5项污染物质的“元年”，北京发布了《2013年至2017年清洁空气行动计划》。北京市环境保护局今天召开新闻发布会，通报2013年全年北京空气质量状况。
北京市环保局环保监测中心主任张大伟介绍，空气质量总体情况：一至六级天数分别为41、135、84、47、45和13天。
张大伟介绍，2013年北京全年一级、二级天即优良天全年共176天，占48.2%。五级、六级重污染天加起来共58天，占15.9%。“这也就是说，每六到七天就有一次重污染天，出现频率较高。”
据介绍，超标污染日中的首要污染物为PM2.5，占77.8%；臭氧，占20.1%，主要发生在5-9月即夏季，高浓度时段集中于午后至傍晚；其他污染物(PM10、NO2仅占2.1%)。(完)
（原标题：北京2013年重污染天数58天 平均每周一天重污染）
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