Nepal's Drinking Water Quality Standards

Group	Parameter	Unit	Maximum Concentration Limits
Physical and chemicals	Turbidity pH Color Taste & Odor Total Dissolved Solids Electrical Conductivity Iron Manganese Arsenic Cadmium Chromium Cyanide Fluoride Lead Ammonia Chloride Sulphate Nitrate Copper Total Hardness Calcium Zinc Mercury Aluminum Residual Chlorine	NTU TCU mg/l µc/cm mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l	5 (10)** 6.5-8.5* 5 (15) Would not be objectionable 1000 1500 0.3 (3) 0.2 0.05 0.003 0.05 0.07 0.5-1.5* 0.01 1.5 250 250 50 1 500 200 3 0.001 0.2 0.1-0.2*
Micro Germs	E-Coli Total Coli form	MPN/100ml MPN/100ml	0 95 % in sample

Note : * These standards indicate the maximum and minimum limits.
** Figures in parenthesis are upper range of the standards recommended.

Sources:
-Environment Statistics of Nepal 2008, Government of Nepal, National Planning Commission Secretariat, Central Bureau of Statistics, Kathmandu, Nepal

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