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प्रश्न
State the meaning of the term ‘water pollution’. State how you would find out, the different sources of pollution of water bodies in the locality.
उत्तर
Water pollution - It is an undesirable change in the chemical, physical & biological conditions of water due to the presence of foreign substances in water. It leads to degrading the quality of water & makes it unsuitable for its designated use.
The main sources of pollution of water bodies in the locality are —
- Household detergents
- Sewage waste
Sources of water pollution in the locality:
- HOUSEHOLD DETERGENTS: They are household chemical cleaning organic compounds used for laundering & dish washing. They contain phosphates mainly sodium triphosphate. Phosphates are a major source of water pollution. Nutrients are added to the water in the form of nitrogen, carbon & phosphorus – generally from sewage.
- DOMESTIC SEWAGE: It is waste water generated from household activities, (sewage also includes liquid waste industry and commerce)
Domestic sewage water contains Organic materials & inorganic materials such as phosphates & nitrates.
Organic from food & vegetables & inorganic from soaps & detergents.
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