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Water Supply System |
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| CHARACTERISTICS | Higest Desirable | Maximum Permissible |
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| Turbidity | 5.0 | 25.00 | | Taste and Odour | Nothing | Disagreeable | | Color (Pt Scale) | 5.00 | 50.00 | | pH | 7.0-8.5 | 6.5-9.2 | | Total Solids | 500 | 1500 | | Total hardness (as CaCo3) | 100.0 | 500.0 | | Magnesium | 30.0 | 150.0 | | Iron (Fe) | 0.1 | 2.0 | | Manganese | 0.05 | 0.5 | | Copper | 0.05 | 1.0 | | Chloride | 200.0 | 600.0 | | Sulphate (as SO4) | 200.0 | 400.0 | | Phenolic substances | 0.001 | 0.002 | | Fluoride * | 1.0 | 1.5 | | Nitrate | 45 | 45 | | Zinc | 5.0 | 15.0 | | Arsenic | - | 0.05 | | Cyanide | - | 0.05 | | Lead | - | 0.10 | | Selenium | - | 0.01 | | Hexavalent Chromium | - | 0.01 |
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| Note: The acceptable Fluoride concentration varies as a
function of ambient temperature. |
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