Drinking Water Quality Standard

Drinking water quality standard

Parameter Group RECOMMENDED RAW WATER QUALITY DRINKING WATER QUALITY STANDARDS
Acceptable Value (mg/litre (unless otherwise stated)) Maximum Acceptable Value (mg/litre (unless otherwise stated))
Total Coliform 1 5000 MPN / 100 ml 0 in 100 ml
E.coli 1 5000 MPN / 100 m 0 in 100 m
Turbidity 1 1000 NTU 5 NTU
Color 1 300 TCU 15 TCU
pH 1 5.5 - 9.0 6.5 - 9.0
Free Residual Chlorine 1 - 0.2 - 5.0
Combined Chlorine 1 - Not Less Than 1.0
Temperature 1 - -
Clostridium perfringens (including spores) 1 - Absent
Coliform bacteria 1 - -
Colony count 22° 1 - -
Conductivity 1 - -
Enterococci 1 - -
Odour 1 - -
Taste 1 - -
Oxidisability 1 - -
Total Dissolved Solids 2 1500 1000
Chloride 2 250 250
Ammonia 2 1.5 1.5
Nitrat 2 10 10
Ferum/Iron 2 1.0 0.3
Fluoride 2 1.5 0.4 - 0.6
Hardness 2 500 500
Aluminium 2 - 0.2
Manganese 2 0.2 0.1
Chemical Oxygen Demand 2 10 -
Anionic Detergent MBAS 2 1.0 1.0
Biological Oxygen Demand 2 6 -
Nitrite 2 - -
Total organic carbon (TOC) 2 - -
Mercury 3 0.001 0.001
Cadmium 3 0.003 0.003
Arsenic 3 0.01 0.01
Cyanide 3 0.07 0.07
Plumbum/Lead 3 0.05 0.01
Chromium 3 0.05 0.05
Cuprum/Copper 3 1.0 1.0
Zinc 3 3 3
Natrium/Sodium 3 200 200
Sulphate 3 250 250
Selenium 3 0.01 0.01
Argentum 3 0.05 0.05
Magnesium 3 150 150
Mineral Oil 3 0.3 0.3
Chloroform 3 - 0.2
Bromoform 3 - 0.1
Dibromoklorometana 3 - 0.1
Bromodiklorometana 3 - 0.06
Fenol/Phenol 3 0.002 0.002
Antimony 3 - 0.005
Nickel 3 - 0.02
Dibromoacetonitrile 3 - 0.1
Dichloroacetic acid 3 - 0.05
Dichloroacetonitrile 3 - 0.09
Trichloroacetic acid 3 - 0.1
Trichloroacetonitrile 3 - 0.001
Trihalomethanes - Total 3 - 1.00
Aldrin / Dealdrin 4 0.00003 0.00003
DDT 4 0.002 0.002
Heptachlor & Heptachlor Epoxide 4 0.00003 0.00003
Methoxychlor 4 0.02 0.02
Lindane 4 0.002 0.002
Chlordane 4 0.0002 0.0002
Endosulfan 4 0.03 0.03
Hexachlorobenzena 4 0.001 0.001
1,2-dichloroethane 4 - 0.03
2,4,5-T 4 - 0.009
2,4,6-trichlorophenol 4 - 0.2
2,4-D 4 0.03 0.03
2,4-DB 4 - 0.09
2,4-dichlorophenol 4 - 0.09
Acrylamide 4 - 0.0005
Alachlor 4 - 0.02
Aldicarb 4 - 0.01
Benzene 4 - 0.01
Carbofuran 4 - 0.007
MCPA 4 - 0.002
Pendimethalin 4 - 0.02
Pentachlorophenol 4 - 0.009
Permethrin 4 - 0.02
Pesticides 4 - -
Pesticides - Total 4 - -
Polycyclic aromatic hydrocarbons 4 - -
Propanil 4 - 0.02
Tetrachloroethene and Trichloroethene 4 - -
Vinyl chloride 4 - 0.005
Gross alpha (α) 5 0.1Bq/l 0.1Bq/l
Gross beta (β) 5 1.0 Bq/l 1.0 Bq/l
Tritium 5 - -
Total indicative dose 5 - -

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