And the surface quality variation we can compare from the upstream area to the downstream area. Part is in the starting point of the Nakkawagu. It has got a TDS concentration of 12.800 milligrams per litre, Sodium is 3.500 milligrams per litre, Chloride of about 3.500 milligrams, Sulphates of 4.400 milligrams and Natrium is 2.500.
Whereas in Ganapathigudem area the TDS is of the order 6.400 milligrams per litre, Sodium of 815 milligrams per litre, Chloride of 1.381 milligrams per litre, Sulphates of 1.400 milligrams per litre, and Natrium is of 2000 milligramms per litre.
In the further downstream, in the Bachhugudem village the TDS of the surface affluent has reduced from 6.400 to 5.500 milligrams per litre and Sodium has reduced from the 800 to 200 milligrams per litre and Chloride has increased from 1.300 to 3.400 milligrams per litre. Sulphates also are found to be increased to about 2.150 milligrams per litre, and Natrium is of the same order as 2.000 milligrams per litre.