- District-wise Locations of Ground Water with Fluoride > 1.5 mg/litre in Tamil Nadu (As on March 2015)
- District-wise Locations having Ground Water with Electrical Conductivity > 3000 µS/cm in Tamil Nadu (As on March 2015)
- District-wise Location having Ground Water with Nitrate > 45 mg/litre in Tamil Nadu (As on March 2015)
- District-wise Locations having Ground Water Arsenic between 0.01 to 0.05 mg/litre in Tamil Nadu (As on March 2015)
- District-wise Location having Ground Water with Iron > 1.0 mg/litre in Tamil Nadu (As on March 2015)
- District-wise Locations having Ground Water with Chloride > 1000 mg/litre in Tamil Nadu (As on March 2015)
- District-wise Location having Ground Water with Nitrate >45 mg/litre in Tamil Nadu (As on March 2008)
- District-wise Locations having Ground Water with Iron > 1.0 mg/litre in Tamil Nadu (As on March 2008)
- District-wise Locations having Ground Water with Fluoride > 1.5 mg/litre in Tamil Nadu (As on March 2008)