What is the main reason of water pollution?

What is the main reason of water pollution? How can the industrial pollution of fresh water be reduced? Suggest three ways.

  • WATER pollution is caused by organic and inorganic industrial wastes and affluents discharged into rivers and other water bodies.
  • Some of the common pollutants of water are dyes, detergents, acids, salts, lead and mercury, pesticides fertilizers, synthetic chemicals with carbon, plastics, rubber etc. are discharged by different industries into the water bodies.
  • Fly ash, phospo-gypsum and iron-steel slags are the major solid wastes of water pollutants.
  • Hot water from factories and thermal plants is drained into rivers and ponds affect adversely aquatic life.

Industrial pollution of fresh water can be reduce in following ways:

  1. Minimising use of water for processing by reusing and recycling it in two or more successive stages.
  2. Harvesting of rain water to meet water requirements.
  3. Treating hot water and effluents before releasing them in rivers and ponds.
  4. Overdrawing of ground water reserves by industries needs to be regulated legally in areas where there is a threat to ground water resources.