Get monthly/daily ambient Air Quality Data from different monitoring stations across India. Details of ambient air quality with respect to air quality parameters, like Sulfur dioxide, Nitrogen dioxide, Respirable Suspended Particulate Matter(RSPM) and Suspended Particulate Matter(SPM) etc. are given in the datasets. Few stations have been shifted/closed/during the period, as those were not meeting the NAMP guidelines for monitoring sites after differential development/change in the area. During1987-2013, SPM has been represented by PM 2.5 (PM2.5 was not being monitored during that period).