S.No. Parameters CPCB 1995 May 2011 June 2011 July 2011 August 2011 Sept. 2011 Oct. 2011
1 Colour Colorless Blackish Blackish Blackish Blackish Blackish Blackish
2 Odour Odourless Unpleasant Unpleasant Unpleasant Unpleasant Unpleasant Unpleasant
3 pH 5.5-9.0 7.27 ± 0.0187 7.25 ± 0.0187 7.21 ± 0.0187 7.14 ± 0.0187 7.19 ± 0.0187 7.21 ± 0.0769
4 Electrical Conductivity (EC) (µmhos/cm) 400 8990 ± 1.8708 9080 ± 1.877 9148 ± 1.877 8354 ± 1.8708 8615 ± 1.8708 8799 ± 2.3166
5 Total Suspended Solids (TSS)(mg/l) 100 6908 ± 1.8708 1138 ± 1.8756 1176 ± 1.8756 1192 ± 1.8708 1184 ± 1.8708 1260 ± 1.8708
6 Total Dissolved Solids (TDS)(mg/l) 2100 6672 ± 1.8748 6712 ± 1.8755 6428 ± 1.8794 5768 ± 1.8794 5950 ± 1.8765 6166 ± 1.8793
7 Biochemical Oxygen Demand (BOD) (mg/l) 30 1722 ± 1.8906 633 ± 1.8760 900 ± 1.8765 600 ± 1.8759 700 ± 1.8062 620 ± 1.8759
8 Chemical Oxygen Demand (COD) (mg/l) 250 9600 ± 2.908 2920 ± 1.8780 2637 ± 1.8780 2386 ± 1.8708 2399 ± 1.8708 2679 ± 1.8708
9 Total Hardness (mg/l) 1000 1080 ± 1.8708 1426 ± 1.1690 1550 ± 1.8708 1625 ± 1.8708 3750 ± 1.8708 2300 ± 1.8708
10 Chloride (mg/l) 1000 1455 ± 1.8725 1890 ± 1.8895 1184 ± 1.8720 1244 ± 1.8708 1373 ± 6.1913 1485 ± 1.7692
11 Sodium (mg/l) 600 1318 ± 1.8708 1300 ± 1.8708 1900 ± 1.8708 2100 ± 1.8708 2040 ± 1.4142 1200 ± 1.672
12 Calcium (mg/l) 100 257 ± 1.7605 300 ± 1.7607 340 ± 1.7612 360 ± 1.7615 390 ± 1.7625 560 ± 1.8062
13 Total Chromium (mg/l) 2 44.5 ± 0.1870 36 ± 0.1870 5.47 ± 0.0187 0.01 ± 0.04319 7.24 ± 0.01769 9.20 ± 0.01871
14 Copper (mg/l) 3 6.40 ± 0.0187 3.89 ± 0.0187 0.00168 ± 0.0001 0.0132 0.0016 0.00124 ± 0.0187 0.00012 ± 0.00063
± Standard Deviation
Table 1: Analysis of physicochemical parameters of Industrial effluent for a period of six months from May 2011-Oct. 2011.