Annex III(a): National Drinking Water Quality Guidelines Maximum Categories Parameters Concentration Limits, Remarks (MCLs) Turbidity, (NTU) 5(10) pH 6.5-8.5* Color, (TCU) 5(15) Physical Taste & Odor Total Dissolved Solid, (mg/l) 1000 Electrical Conductivity 1500 Iron, (mg/l) 0.3(3) Manganese, (mg/l) 0.2 Arsenic, (mg/l) 0.05 Cadmium, (mg/l) 0.003 Chromium, (mg/l) 0.05 Cyanide, (mg/l) 0.07 Fluoride, (mg/l) 0.5-1.5* Lead, (mg/l) 0.01 Ammonia, (mg/l) 1.5 Chloride, (mg/l) 250 Chemical Sulphate, (mg/l) 250 Nitrate, (mg/l) 50 Copper, (mg/l) 1 Total Hardness, (mg/l) 500 Calcium, (mg/l) 200 Zinc, (mg/l) 3 Mercury, (mg/l) 0.001 Aluminum, (mg/l) 0.2 Only for Residual Chlorine, (mg/l) 0.1-0.2* chlorinated systems E-Coli, (MPN Index / 100ml) 0 Coliform, (MPN Index / 0(95)% ) 100ml) Note: 1. *: Represents the values. 2. ( ): The indicated values inside the brackets represent for water if other alternative options are unavailable. Source: Standards adopted from Department of Water Supply & Sewerage
Annex III(a): National Drinking Water Quality Guidelines Categories Parameters Maximum Concentration Limits, (MCLs) Remarks Physical Turbidity, (NTU) 5(10) pH 6.5-8.5* Color, (TCU) 5(15) Taste & Odor Total Dissolved Solid, (mg/l) 1000 Electrical Conductivity 1500 Chemical Iron, (mg/l) 0.3(3) Manganese, (mg/l) 0.2 Arsenic, (mg/l) 0.05 Cadmium, (mg/l) 0.003 Chromium, (mg/l) 0.05 Cyanide, (mg/l) 0.07 Fluoride, (mg/l) 0.5-1.5* Lead, (mg/l) 0.01 Ammonia, (mg/l) 1.5 Chloride, (mg/l) 250 Sulphate, (mg/l) 250 Nitrate, (mg/l) 50 Copper, (mg/l) 1 Total Hardness, (mg/l) 500 Calcium, (mg/l) 200 Zinc, (mg/l) 3 Mercury, (mg/l) 0.001 Aluminum, (mg/l) 0.2 Residual Chlorine, (mg/l) 0.1-0.2* Only for chlorinated systems E-Coli, (MPN Index / 100ml) 0 Coliform, (MPN Index / 100ml) 0(95)% ) Note: 1. *: Represents the values. 2. ( ): The indicated values inside the brackets represent for water if other alternative options are unavailable. Source: Standards adopted from Department of Water Supply & Sewerage
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