Table 5 Summary of chemical analyses of surface waters in 10th RIR
Parameter | Number of samples | Min | Max | Average | Standard deviation | Permissible ranges (WHO 1996) |
|---|---|---|---|---|---|---|
pH Value | 14 | 6.5 | 8.9 | 7.8 | 0.7 | 6.5–8.5 |
TDS (mg/l) | 14 | 220.0 | 2872.0 | 936.1 | 822.5 | 1000 |
Ca (mg/l) | 14 | 31.8 | 111.1 | 67.6 | 28.4 | 75 |
Mg (mg/l) | 14 | 10.9 | 43.7 | 20.3 | 9.5 | 150 |
Na (mg/l) | 14 | 27.0 | 1000.0 | 267.8 | 300.5 | 200 |
K (mg/l) | 14 | 3.0 | 72.0 | 18.5 | 19.3 | 12 |
HCO3 (mg/l) | 14 | 151.7 | 1215.1 | 486.9 | 309.3 | 500 |
SO4 (mg/l) | 14 | 12.0 | 190.0 | 92.9 | 61.1 | 250 |
Cl (mg/l) | 14 | 27.9 | 1006.5 | 255.4 | 310.8 | 250 |
Ni (µg/l) | 14 | 0.4 | 133.5 | 34.8 | 40.5 | 20 |
Co (µg/l) | 14 | 0.4 | 6.2 | 2.6 | 1.9 | 50 |
Pb (µg/l) | 14 | 1.4 | 33.2 | 15.8 | 8.9 | 50 |
Cd (µg/l) | 10 | 0.3 | 0.5 | 0.3 | 0.1 | 3 |
Cu (µg/l) | 14 | 0.4 | 44.8 | 18.9 | 16.2 | 5 |
Zn (µg/l) | 14 | 2.0 | 417.3 | 104.0 | 136.6 | 3000 |
Mn (µg/l) | 14 | 4.2 | 349.7 | 98.6 | 108.2 | 500 |
Fe (µg/l) | 14 | 31.2 | 4168.0 | 887.5 | 1292.9 | 300 |