Question

why should we not allow water to get collected in drains

Answer 1

1) promotes infections, and other harmful diseases

2) untidy environment and becomes a breeding ground for insects (mosquitoes etc)

Answer 2

we should not allw water to get collected in drains because the mosquitoes especially those of dengu can infect that water and directly it will harm the people living in the surrounding areas.

Bacteria and fungi are also a major problem.