Seasons Months 2010 2011
Station I Station II Station I Station II
Post monsoon January 17 18.54 18.3 18.69
February 12.3 15.31 12.9 17.1
March 10.7 15.28 12.4 14
Summer April 12.2 14.95 13.2 13.05
May 10.3 13.5 12.4 12.34
June 11.6 12.84 12.3 11.96
Pre monsoon July 13.2 12.85 13.6 14.65
August 16.0 18.24 16.9 18.76
September 16.5 21.36 17.2 23.0
Monsoon October 19 24.73 22.1 25.42
November 21.3 28.15 23.6 29.21
December 24.4 29.41 25.6 29.54
Table 8: Monthly variations of nitrate (µM) from January 2010 to December 2011.