author(s)
AK Rai, Shivangi Singh, Sadaf Zia, Padmini Manikpuri, Kamin Alexander and Verma OP

abstract
Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) are the most commonly used parameters for the characterization of water samples. A correlation between chemical oxygen demand (COD) and biological oxygen demand (BOD) in Sangam water during Kumbh 2019 has been studied. Sangam water sample has been collected from the Holy bath from Sangam from January to March 2019 at Prayagraj city. It was found that the value of correlation coefficient (r) is very close to one (1) from both pre and post bath samples (January- March 2019). The values of empirical parameters a and b were found to be 1.03 and 0.53 of pre and post sample respectively, indicating that there is a highly significant correlation between chemical oxygen demand (COD) and biological oxygen demand (BOD). The value for pre bath of a = 1.34 and b = 0.51 and the value for post bath of a = 2.31 and b = 0.37, thus indicating that there is highly significant correlation between chemical oxygen demand (COD) and biological oxygen demand (BOD).