FREQUENCY_UNIT_INDICATOR_CW
CW indicates whether the file contains cross-walked district codes or not. Absence of CW postfix indicates the absence of crosswalked district codes
crosswalked dataset are used to compare throughout timelines as it has been treated for changes in region border changes
non-crosswalked dataset are used for analysis for one point of time

Data Source Ministry of Environment and Forestry, Processed by LPEM FEB UI
Last updated 31 December 2019

The Air Quality Index (IKU) composed of 2 parameters, SO2 and NO2. It is being calculated by the ambiance measurement in 4 locations that represented industrial area, residential area, transportation hub, and office complexes using manual passive sampling method. The index also adopts European Union Directives standards.