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Social & Preventive Medicine General 57d8221f

All included in WHO criteria for water quality except

A
Hardness of water below 3000 mg/l
B
Lead below 0.01 mg/l
C
Nitrates <3 mg/l
D
Zero infections micro - organisms
High-Yield Explanation
Nitrates < 45 mg/l Nitrites <3 mg /l

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