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Category of Fresh Water Best Usage
Arsenic (As)
A-I Unfiltered Public water supply after approved disinfection
0.3 mg/l
A-II Public water supply with approved treatment equal to coagulation, sedimen- tation & disinfection
0.3 mg/l
A-III Not fit for human consumption, Fish & Wildlife Propagation
1.0 mg/l
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A-IV Fit for Agriculture, Industrial cooling & process water.
0.1 mg/l