List of uncertified air quality measurements (UTDs) in Romania, APRIL month, 2015

The data set contains uncertified measurements of air quality monitoring stations starting with 2015. The data are grouped into distinct, unique files containing the values of all the parameters purchased during a calendar month. The file structure is unique. Each dataset includes monthly values of all 144 stations本数据集收录2015年起的空气质量监测站（air quality monitoring stations）未认证监测数据。数据按独立唯一的文件分组，每个文件包含一个自然月内记录的全部参数数值。文件结构具有唯一性。每个数据集涵盖全部144个监测站的月度监测数值。