Table 3.
Comprehensive pollution index at various locations in river Ganga since 1989 to 2016.
| Sampling year | CPI (Pre-monsoon) |
CPI (Monsoon) |
CPI (Post-monsoon) |
||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| S1 | S2 | S3 | S4 | S5 | S1 | S2 | S3 | S4 | S5 | S1 | S2 | S3 | S4 | S5 | |
| 1989 | 0.31 | 0.39 | 0.44 | 0.51 | 0.52 | 0.34 | 0.44 | 0.45 | 0.41 | 0.53 | 0.37 | 0.38 | 0.36 | 0.33 | 0.53 |
| 1990 | 0.51 | 0.33 | 0.30 | 0.36 | 0.51 | 0.50 | 0.55 | 0.54 | 0.50 | 0.55 | 0.41 | 0.53 | 0.53 | 0.51 | 0.52 |
| 1991 | 0.37 | 0.44 | 0.42 | 0.44 | 0.46 | 0.40 | 0.39 | 0.39 | 0.39 | 0.36 | 0.39 | 0.38 | 0.40 | 0.40 | 0.38 |
| 1992 | 0.33 | 0.38 | 0.40 | 0.39 | 0.40 | 0.38 | 0.36 | 0.35 | 0.35 | 0.36 | 0.39 | 0.37 | 0.41 | 0.38 | 0.38 |
| 1993 | 0.33 | 0.40 | 0.38 | 0.36 | 0.42 | 0.36 | 0.32 | 0.32 | 0.28 | 0.34 | 0.40 | 0.33 | 0.35 | 0.34 | 0.36 |
| 1994 | 0.34 | 0.39 | 0.40 | 0.38 | 0.42 | 0.36 | 0.37 | 0.33 | 0.34 | 0.36 | 0.40 | 0.34 | 0.36 | 0.38 | 0.34 |
| 1995 | 0.34 | 0.39 | 0.39 | 0.39 | 0.39 | 0.34 | 0.35 | 0.32 | 0.33 | 0.36 | 0.33 | 0.32 | 0.33 | 0.35 | 0.34 |
| 1996 | 0.35 | 0.36 | 0.36 | 0.38 | 0.38 | 0.31 | 0.36 | 0.32 | 0.34 | 0.35 | 0.37 | 0.35 | 0.34 | 0.35 | 0.36 |
| 1997 | 0.32 | 0.38 | 0.36 | 0.38 | 0.40 | 0.35 | 0.36 | 0.29 | 0.33 | 0.34 | 0.35 | 0.35 | 0.34 | 0.36 | 0.35 |
| 1998 | 0.32 | 0.37 | 0.34 | 0.36 | 0.36 | 0.34 | 0.35 | 0.30 | 0.32 | 0.33 | 0.36 | 0.35 | 0.32 | 0.34 | 0.32 |
| 1999 | 0.33 | 0.38 | 0.34 | 0.37 | 0.38 | 0.35 | 0.36 | 0.32 | 0.34 | 0.32 | 0.34 | 0.35 | 0.34 | 0.36 | 0.34 |
| 2000 | 0.33 | 0.38 | 0.36 | 0.37 | 0.38 | 0.36 | 0.35 | 0.30 | 0.34 | 0.35 | 0.41 | 0.36 | 0.36 | 0.36 | 0.35 |
| 2001 | 0.41 | 0.41 | 0.40 | 0.40 | 0.40 | 0.42 | 0.42 | 0.36 | 0.38 | 0.39 | 0.44 | 0.41 | 0.39 | 0.40 | 0.37 |
| 2002 | 0.39 | 0.47 | 0.42 | 0.46 | 0.41 | 0.38 | 0.40 | 0.37 | 0.37 | 0.37 | 0.42 | 0.37 | 0.38 | 0.36 | 0.35 |
| 2003 | 0.37 | 0.40 | 0.42 | 0.41 | 0.39 | 0.37 | 0.40 | 0.36 | 0.36 | 0.37 | 0.41 | 0.38 | 0.37 | 0.36 | 0.32 |
| 2004 | 0.37 | 0.39 | 0.42 | 0.41 | 0.37 | 0.36 | 0.42 | 0.39 | 0.37 | 0.39 | 0.40 | 0.39 | 0.39 | 0.35 | 0.36 |
| 2005 | 0.41 | 0.41 | 0.41 | 0.39 | 0.40 | 0.39 | 0.40 | 0.39 | 0.37 | 0.44 | 0.41 | 0.38 | 0.40 | 0.39 | 0.38 |
| 2006 | 0.43 | 0.43 | 0.45 | 0.43 | 0.40 | 0.49 | 0.43 | 0.40 | 0.53 | 0.54 | 0.53 | 0.46 | 0.41 | 0.47 | 0.64 |
| 2007 | 0.49 | 0.54 | 0.43 | 0.50 | 0.67 | 0.47 | 0.48 | 0.49 | 0.48 | 0.51 | 0.47 | 0.48 | 0.51 | 0.50 | 0.47 |
| 2008 | 0.37 | 0.46 | 0.46 | 0.46 | 0.45 | 0.41 | 0.45 | 0.40 | 0.33 | 0.42 | 0.42 | 0.38 | 0.36 | 0.38 | 0.38 |
| 2009 | 0.38 | 0.43 | 0.39 | 0.39 | 0.40 | 0.38 | 0.49 | 0.39 | 0.37 | 0.42 | 0.39 | 0.40 | 0.37 | 0.37 | 0.36 |
| 2010 | 0.35 | 0.39 | 0.40 | 0.39 | 0.40 | 0.35 | 0.36 | 0.38 | 0.33 | 0.38 | 0.38 | 0.33 | 0.34 | 0.34 | 0.34 |
| 2011 | 0.44 | 0.38 | 0.39 | 0.37 | 0.37 | 0.41 | 0.45 | 0.39 | 0.35 | 0.37 | 0.40 | NA | 0.38 | 0.34 | 0.34 |
| 2012 | 0.31 | NA | 0.34 | 0.35 | 0.33 | 0.38 | 0.32 | 0.38 | 0.31 | 0.33 | 0.37 | NA | 0.40 | 0.34 | 0.31 |
| 2013 | 0.34 | NA | 0.35 | 0.38 | 0.41 | 0.37 | NA | 0.40 | 0.34 | 0.37 | 0.38 | NA | 0.40 | 0.37 | 0.43 |
| 2014 | 0.35 | NA | 0.35 | 0.39 | 0.42 | 0.39 | NA | 0.42 | 0.37 | 0.39 | 0.43 | NA | 0.46 | 0.40 | 0.40 |
| 2015 | 0.45 | NA | 0.77 | 0.42 | 0.46 | 0.47 | NA | 0.52 | 0.50 | 0.74 | NA | NA | NA | 0.47 | 0.52 |
NA — not assessed.