Question

The maximum permissible limit for suspended solids is ____________

(a) 10 mg/l

(b) 20 mg/l

(c) 30 mg/l

(d) 40 mg/l

The question was posed to me during a job interview.

I need to ask this question from Physical characteristic of Water topic in section Quality of Water of Environmental Engineering

Answer 1

Correct option is (c) 30 mg/l

Easiest explanation: The maximum permissible limit for suspended solids is 30mg/l  for testing waste water which is set by the Environmental Protection Agency (EPA).