1 July 2022

Indian drinking water standards

Indian drinking water standards

Characteristics Acceptable Cause for rejection
Turbidity (NTU) 1 10
Colour (Units on Platinum Coat scale 5 25
Taste and Odor Unobjectionable Unobjectionable
pH 7.0 – 8.5 < 6.5 to >9.2
Total dissolved solids (mg/l) 500 2000
Total hardness (as CaCO2) mg/l 200 600
Chlorides (as CI) mg/l 200 1000
Sulphats (as SO4) mg/l 200 400
Fluorides (as F) mg/l 1 1.5
Nitrates (as NO3) mg/l 45 45
Calcium (as Ca) mg/l 75 200
Magnesium (as MG) mg/l < 30 150
Iron (as Fe) mg/l 0.1 1
Manganese (as Mn) mg/l 0.05 0.5
Copper (as Cu) mg/l 0.05 1.5
Aluminum A\(as Al) mg/l 0.03 0.2
Alkalinity mg/l 200 600
Residual Chlorine mg/l 0.2 > 1.0
Zinc (as Zn) mg/l 5 15
Phenolic compounds *(as Phenol mg/l 0.001 0.002
Anionic detergents mg/l (as MBAS) 0.2 1
Mineral Oil mg/l 0.01 0.03
Arsenic (as As) mg/l 0.01 0.05
Cadmium (as Cd) mg/l 0.01 0.01
Chromium (as Cd) mg/l 0.05 0.05
Cyanides (as CN) mg/l 0.05 0.05
Lead (as Pb) mg/l 0.05 0.05
Selenium (as Se) mg/l 0.01 0.01
Mercury (total as Hg) mg/l 0.001 0.001
Polynuclear aromatic hydrocarbons (PAH) mg/l 0.2 0.2
Pesticides (total) mg/l Absent Refer WHO guidelines
Gross Alpha activity (Bq/1) 0.1 0.1
Gross Beta activity (Bq/1) 1 1

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