WATER TREATMENT IS NECESSARY FOR HUMAN CONSUMPTION, AS REQUIRED FOR REMOVAL OF GERMS OF DISEASES, SOLID IMPURITIES, TASTE, ODOUR, COLOUR, IRON AND MINERAL SALTS ETC.

It has been observed and stated that water found in the nature is seldom, if ever, all pure and free from danger for human consumption and most water require treatment for the removal of germs of diseases, solid impurities, taste, odour, colour iron and the mineral salts, etc In general the treatment given to water is adjusted suitably to the characteristics of the raw water and the nature of impurities to be dealt with. The main treatment required for surface water is for:(1) Contamination (2) Corrosion;(3) turbidity, taste and colour; and for underground waters is for removal hardness and scale forming salts, corrosive salts and excess iron and the other minerals. Particular attention should be made to planning and lay out of water treatment works in such a way that its capacity may be enlarged without difficulty in future for any of population. The treatment works should be located as near the source of supply as possible. The various processes involved in the purification of water should have proper vision and treatment under the provision made and required for the storage,, penetration of sunlight in to water, screening, sedimentation, coagulation/flocullation, sterilisation and chlorination etc.