1.Habitations with any contamination including Arsenic are counted under 'Arsenic' Column.
2.Habitations with any contamination including Fluoride and without Arsenic are counted under 'Fluoride' Column.
3.Habitations with any contamination including Iron and without Arsenic and Fluoride are counted under 'Iron' Column.
4.Habitations with any contamination including Salinity and without Arsenic,Fluoride and Iron are counted under 'Salinity' Column.
5.Habitations with any contamination including Nitrate and without Arsenic, Fluoride, Iron and Salinity are counted under 'Nitrate' Column.
6.Habitations with any contamination including Heavy Metal and without Arsenic, Fluoride, Iron, Salinity and Nitrate are counted under 'Heavy Metal' Column.
7.CWPP Habs : Habitations have been covered by CWPPs.