Delhi's ambient PM2.5 concentrations data for 2006-2018

This dataset presents Delhi's ambient PM2.5 data in the raw format at 15-minute interval for the period of 2006 to 2018. The data is obtained from the online open repository operated and maintained by the Central Pollution Control Board (CPCB), India. https://app.cpcbccr.com/ccr/#/caaqm-dashboard-all/caaqm-landing (last accessed August 21st, 2020). Use the advance search option to download. The data request conditions vary by pollutant, time step, and total time period. The data was filtered for nulls, negatives, and unexplainable feeds for quality control. Cleaned composite concentrations file for all of Delhi includes hourly averages, monthly averages, annual averages, number of operating stations by year, and data availability as % of 15-minute data points in a year

本数据集提供了2006年至2018年德里地区环境细颗粒物（PM2.5）的原始观测数据，采样间隔为15分钟。该数据取自印度中央污染控制委员会（Central Pollution Control Board, CPCB）运营维护的在线开放资源库，其访问链接为https://app.cpcbccr.com/ccr/#/caaqm-dashboard-all/caaqm-landing，最后访问时间为2020年8月21日。用户可通过高级搜索选项下载该数据，数据申请条件因污染物类型、时间步长及总时长的不同而有所差异。为保障数据质量，已针对空值、负值及无法解释的异常记录完成过滤清洗工作。针对德里全域的清洗后复合浓度数据文件包含小时均值、月均值、年均值、各年度运行监测站数量，以及以年度内15分钟数据点占比计算得出的数据可用率。