Table 5 Water quality index using BIS standards.
Parameter | Standard value | (Standard values)−1 | Observed value | Wn | Qn | WnQn |
|---|---|---|---|---|---|---|
pH | 7.5 | 0.1 | 7.4 | 0.1 | 87.5 | 8.75 |
Conductivity (mho/cm) | 300 | 0.0 | 2044.8 | 0.0 | 681.6 | 0 |
COD (mg/L) | 4 | 0.3 | 39.5 | 0.1 | 987.5 | 98.7 |
Hardness (mg/L) | 200 | 0.0 | 474.9 | 0.0 | 237.4 | 0 |
Alkalinity (mg/L) | 200 | 0.0 | 379.5 | 0.0 | 189.8 | 0 |
TDS (mg/L) | 500 | 0.0 | 731.1 | 0.0 | 146.2 | 0 |
Chloride (mg/L) | 250 | 0.0 | 424.8 | 0.0 | 169.9 | 0 |
Sulphate (mg/L) | 200 | 0.0 | 225.6 | 0.0 | 112.8 | 0 |
Nitrate (mg/L) | 45 | 0.0 | 10.0 | 0.0 | 22.1 | 0 |
Summation | 0.4 | 107.45 |
