Question

what do you mean by sewage ?Why untreated sewage should not be discharged into rivers or seas ?

Answer 1

Sewage is a liquid waste. It consists of waste water from houses, offices, factories, hospitals etc. It has a complex mixture containing suspended solids, organic and inorganic impurities, nutrients, saprotropic and diease causing bacteria and other microbes.

If the untreated sewage is discharged into rivers and seas, it will pollute the water resources. It will also harm the aquatic life and spread many diesel like cholera, typhoid, polio, meningitis, malaria, dengue etc.

Answer 2

Hii dear here is your answer.

Sewage is a liquid waste consists of wastewater from houses, offices, factories, hospitals etc. It is a complex mixture containing suspended solids, organic and inorganic impurities, nutrients, saprotrophic and disease causing bacteria other microbes.

If the untreated sewage is discharged into rivers and seas, it will cause water pollution and soil pollution, in which both the surface water get polluted. Ground water is a source of water for wells, tube wells, springs, and many rivers. Therefore, if it gets polluted, it becomes the most common route for water-borne disease like cholera, typhoid, polio, meningitis, malaria, dengue etc.

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