Table 5: Drinking water standards, unit weights, average water quality, and water quality index of five study stations in Lake Wular.

Chemical parametersStandardsRecommending agencyUnit weight (wi)MakhdoomyariVintageAshtangWatlabNingle
Av WqAv WqAv WqAv WqAv Wq

pH7.0–8.5ICMR0.0377.844.197.763.807.803.977.753.737.773.87
Electrical conductivity 750 µS/cmWHO0.000252.90.01254.20.01255.40.01282.30.01248.50.01
Chloride 250 mg/LISI0.00112.350.0113.340.0114.330.0114.110.0112.850.01
Dissolved oxygen 5.0 mg/LWHO0.0529.033.048.933.108.933.108.943.099.122.99
Free CO222 mg/LWHO0.0129.890.5410.020.5410.000.5410.040.5410.430.57
Total alkalinity 120 mg/LUSPHS0.002112.70.21107.00.1999.540.18114.50.21102.00.19
Total hardness 500 mg/LWHO0.001145.50.02143.90.02142.20.01161.70.02128.20.01
Nitrate-N 45 mg/LWHO0.0060.470.010.480.010.480.010.460.010.420.01
Calcium 75 mg/LICMR0.00321.160.1020.880.1020.610.1026.050.1219.850.09
Magnesium 50 mg/LICMR0.00913.500.3913.660.2413.230.2314.090.2511.470.20
Sulfate 200 mg/LICMR0.0016.100.005.500.005.030.004.770.003.900.00
Iron 0.3 mg/LISI0.8740.1440.70.1338.50.1339.10.1132.60.1029.1
Total dissolved solids 500 mg/LWHO0.001154.10.02146.90.02133.30.01106.80.0177.080.01

1.0049.246.547.340.637.1