All of the following are acceptable criteria for water quality except

All of the following are acceptable criteria for water quality except –

A. Dissolved O2 of 5 mg/L

B. Nitrates of 1 mg/L

C. Nitrites of 1-2 mg/L

D. Free & saline NH3 of 0.05 mg/L

Correct Answer: Dissolved O2 of 5 mg/L

Description: The dissolved oxygen content of water is influenced by the raw water temperature,composition,treatment and any chemical or biological processes taking place in the distribution system.No health based guideline value has been recommended (refer pgno:720 park 23rd edition)

Category: Social & Preventive Medicine

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