Parameter | S1 | S2 | S3 | Mean value | Grand mean | variance | Standard deviation |
(mg/L) | (˚) | ||||||
Nitrate | 0.04 | 0.03 | 0.03 | 0.03 | |||
Phosphate | 5 | 7.21 | 3.92 | 5.38 | |||
DO | 0.71 | 0.5 | 0.2 | 0.47 | |||
BOD | 184.71 | 186.5 | 172 | 181.07 | |||
Mean value | 47.62 | 48.56 | 44.04 | 11.69 | 0.92 | 0.96 | |
Iron | 0.001 | 0.001 | 0.1 | 0.034 | |||
Manganese | 1.53 | 1.18 | 1.47 | 1.4 | |||
Lead | 18.9 | 21.7 | 39.7 | 26.8 | |||
Mean value | 6.8 | 7.6 | 13.8 | 9.4 | 0.17 | 0.41 |