Overrun days of fine dust (PM10) in North Rhine-Westphalia

According to EU Directive 1999/30/EC, only 35 exceedances of the PM10 daily mean value of 50 µg/m³ per year are permitted from 1 January 2005. The file contains the exceedances of this value, which have occurred since 01.01. of the current year, divided into two different measuring methods. In the top section of the table you will find the daily updated results of the continuous measurements. In the lower part, the results of the reference procedure are listed. For metrological reasons, the results of the reference procedure are not currently available, but usually only about 6 weeks after the end of a measurement month. They are updated monthly. Please note that each measuring station is listed only once. If both methods are used at a measuring station, only the results of the reference procedure are considered for the assessment of the exceedance days. In the context of quality assurance, the more precise reference procedure is given priority over the continuous procedure.根据欧盟《1999/30/EC指令》，自2005年1月1日起，每年PM10日均值50微克/立方米的超标次数上限为35次。本数据集收录了自本年1月1日起发生的上述限值超标事件，并按两种不同监测方法进行分类。表格上半部分为连续监测的每日更新结果，下半部分则列出参考方法的监测结果。出于计量学考量，参考方法的结果目前暂不可用，通常需在监测月份结束后约6周方可获取，且更新频率为每月一次。请注意，每个监测站仅会被列出一次。若某监测站同时采用两种监测方法，则在评估超标天数时仅参考参考方法的监测结果。在质量保证体系框架下，精度更高的参考方法优先级高于连续监测方法。