Question

how to reduce of water pollution?

Answer 1

we can reduce water pollution by some measures.
setting up water treatment plant
proper disposal of industrial waste
some laws and punishments for water contamination
proper implementation of these laws
spreading awareness

Answer 2

Things You Can Do To Reduce Water Pollution

DO NOT pour fat from cooking or any other type of fat, oil, or grease down the sink.

DO NOT dispose of household chemicals or cleaning agents down the sink or toilet.

DO NOT flush pills, liquid or powder medications or drugs down the toilet.

Avoid using the toilet as a wastebasket.

Avoid using a garbage disposal.