We are not able to meet the demand for water of all the people in our country, despite good rains because:

(i) There is a rapid increase in our population.

(ii) Since there is lack of sufficient vegetation on ground, not much rain water seeps into the ground and gets stored as ground water.

(iii) High amount of water is required for the irrigation of the high yielding varieties of crops.

(iv) Untreated sewage and industrial waste is discharged into water bodies.