Friday, 25 May 2018

WHO Guidelines For Drinking Water

WHO produces international norms on water quality and human health in the form of guidelines that are used as the basis for regulation and standard setting, in developing and developed countries worldwide. The quality of drinking water is a powerful environmental determinant of health. Assurance of drinking water safety is a foundation for the prevention and control of waterborne diseases. The guidelines developed by WHO are prepared through a vast global consultative process involving WHO member states (India is the member state), national authorities and international agencies, in consultation with the WHO Expert Advisory Panel.



ParametersStandard limits as per WHO guidelines (mg/L)
Acrylamide0.0005
Alachor0.02
Aldicarb0.01
Aldrin and Dieldrin0.00003
Ammonia1.5
Antimony0.02
Arsenic0.01
Atrazine0.002
Barium0.7
Benzene0.01
Benzo(?)pyrene0.0007
Boron0.5
Bromate0.01
Bromodichloromethane (BDCM)0.06
Bromoform0.1
Cadmium0.003
Carbofuran0.007
Carbon tetrachloride0.004
Chlorate0.7
Chlordane0.0002
Chloramines0.5 - 1.5
Chloride200 - 300
Chlorine5
Chlorite0.7
Chloroform0.3
Chlorotoluron0.03
Chlorpyrifos0.03
Chromium0.05
Colour in drinking waterNo visible colour
Copper2.0
Cyanazine0.0006
Cyanide0.07
1,2-Dichlorobenzene1.0
1,4-Dichlorobenzene0.3
1,2-Dichloroethane0.03
Dichloromethane0.02
2,4-Dichlorophenoxyacetic acid0.03
DDT and metabolites0.001
Di(2-ethylhexyl)phthalate0.008
1,2-Dichloroethylene0.05
1,2-Dichloropropane0.04
Dimethonate0.006
1,4-Dioxane0.05
Dissolved oxygenNo health-based guideline value is recommended
Edetic acid (EDTA)0.6
Endrin0.0006
Epichlorohydrin0.0004
Ethylbenzene0.3
Fenoprop0.009
Fluoride1.5
Hexachlorobutadiene0.0006
IronNo health-based guideline value is proposed
Isoproturon0.009
Lead0.01
Lindane0.002
Manganese0.4
Mercury0.006
Methoxychlor0.02
Metolachlor0.01
Microcystin-LR0.001
Molinate0.006
Molybdenum0.07
Monochloroacetate0.02
N-Nitrosodimethylamine0.0001
Nickel0.07
Nitrate50
Nitrilotriacetic acid (NTA)0.2
Nitrite3
Pendimethalin0.02
Pentachlorophenol0.009
Permethrin0.3
pHNo health-based guideline value is proposed
Pyriproxyfen0.3
Selenium0.01
Simazine0.002
SulphateNo health-based guideline value has been derived
Styrene0.02
Terbuthylazine0.007
Tetrachloroethylene0.04
Toluene0.7
Total dissolved solids (TDS)No health-based guideline value is proposed
Trichloroacetate0.2
Trichloroethylene0.02
2,4,6,-Trichlorophenol0.2
Trifluralin0.02
Trutuim10000 Bq/L
Uranium0.015
Vinyl chloride0.0003
Xylenes-total0.5
ZincNo health-based guideline value is proposed
























































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