Appendix P — Recommended Water Quality for Domestic Purposes

Table 8.P.1: Water Quality Standards
            Water Quality             Unit      WHO Guideline Environmental
             Parameters                           Values     Conservation Rules
                                                  (2004)        (ECR, 1997)
 1. pH                                Value        6.5 - 8.5       6.5 - 8.5
 2. Turbidity                         NTU              5              10
 3. Color                             TCU             15              15
 4. Odor                              TON              --          Odorless
 5. Hardness (as CaCO3)               mg/l            500          200-500
 6. Iron (Fe)                         mg/l            0.3           0.3-1.0
 7. Manganese, Mn                     mg/l           0.4*            0.1
 8. Sodium, Na                        mg/l            200            200
 9. Calcium, Ca                       mg/l             --             75
 10. Magnesium, Mg                    mg/l             --           30-35
 11, Potassium, K                     mg/l             --             12
 12. Chloride, Cl                     mg/l            250          150-600
 13. Nitrate, NO3                     mg/l            50              10
 14.Ammonia-Nitrogen, NH3-N           mg/l            1.5            0.5
 15. Sulfate, SO4                     mg/l            250            400
 16.Phosfate, PO4                     mg/l             --             6
 17. Fluoride, F                      mg/l          0.6 -1.5          1
 18. Mercury, Hg                      mg/l           0.001          0.001
 19. Arsenic, As                      mg/l           0.01            0.05
 20. Lead, Pb                         mg/l           0.01            0.05
 21. Chromium, Cr                     mg/l           0.05           0.05
 22. Cadmium, Cd                      mg/l           0.003          0.005
 23. Boron, B                         mg/l            0.5            1.0
 24. Aluminum, Al                     mg/l            0.2            0.2
 25. Nickel, Ni                       mg/l           0.02            0.1
 26. Copper, Cu                       mg/l            2.0            1.0
 27. Total Dissolved Solids, TDS      mg/l           1000           1000
 28. Total Suspended Solids, SS       mg/l             --             10
 29. Total Coliform, TC               CFU              0              0
 30. Faecal Coliform, FC              CFU              0              0
    * Health Risk Guideline Value