Leachate Constituents	Mean value		Individual pollution rating Pi		Weight Wi		Overall pollution rating PiWi
Leachate Constituents	Pre- monsoon	Post- monsoon	Pre- monsoon	Post- monsoon	Pre- monsoon	Post- monsoon	Pre- monsoon	Post- monsoon
pH	5.02	4.54	8	8	0.055	0.055	0.44	0.44
TDS	16300	14300	38	35	0.050	0.050	1.9	1.75
Chloride	8483	4954	79	40	0.048	0.048	3.79	1.92
COD	36000	34012	82	81	0.062	0.062	5.08	5.02
BOD	11022	10230	66	64	0.061	0.061	4.03	3.90
Ammonia Nitrogen	111	101	10	10	0.051	0.051	0.51	0.51
Fe	30	29	5	5	0.045	0.045	0.23	0.23
Cu	0.35	0.29	5	5	0.050	0.050	0.25	0.25
Zn	1.6	1.4	5	5	0.056	0.056	0.28	0.28
Ni	1.12	1.0	5	5	0.052	0.052	0.26	0.26
Pb	0.23	0.22	5	5	0.063	0.063	0.32	0.32
Total					0.593	0.593	17.08	14.88
LPI							28.81	25.09