Limit of B.O.D. prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste waters into natural surface waters, is

< 30 ppm

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< 3.0 ppm

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< 10 ppm

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< 100 ppm

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Solution

The correct option is D < 10 ppm
Biochemical oxygen demand (BOD) is the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period. The central pollution control board prescribed the BOD limit for the discharge of industrial and municipal waste water as < 10ppm
So, the correct answer is '< 10 ppm'

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