Question

why does river water get polluted?​

Answer 1

Answer:

Sources of pollution

If large amounts of fertilizers or farm waste drain into a river the concentration of nitrate and phosphate in the water increases considerably. Algae use these substances to grow and multiply rapidly turning the water green. This massive growth of algae, called eutrophication, leads to pollution.

Answer 2

Explanation:

because Factories and Industries are flowing their poisonous chemical industrial waste in rivers and lakes .

If large amount of fertilizer or farm waste drain into a river the concentration of nitrate and phosphate in the water increase considerable.