Parameter | Quantity | Permissible limits [17] |
pH Colour (PtCo units) BOD COD Cl− NO− 3 SO2− 4 Cr (total) Cr (VI) Pb Ni Zn Cu Cd | 9.0 492.0 ± 4.5 536.0 ± 4.5 772.0 ± 5.0 245.0 ± 3.0 59.7 ± 1.2 101.30 ± 1.4 12.3 ± 0.01 5.17 ± 0.05 0.66 ± 0.01 0.29 ± 0.01 0.50 ± 0.01 0.17 ± 0.003 0.07 ± 0,002 | 6 - 8.0 300.0 50.0 100.0 500.0 20.0 500.0 1.0 0.05 0.1 1.0 5.0 1.0 0.10 |