author(s)
Nisha Rana and Seema Jain

abstract
The present study was conducted to assess the physico-chemical parameters of freshwater ponds of district Bijnor (U. P), India during August 2016 to January 2017. Analysis was performed on 11 different parameters. The results showed that the pH ranged from 9.00-11.00; DO 8.0-16.0 mg/l; BOD 2.0-6.0 mg/l; COD 14.5-15.0mg/l; total dissolved solids 84 - 86 mg/l; total hardness 100 - 450 mg/l; calcium 140- 150 mg/l; magnesium 46- 120 mg/l; chlorides 38.90- 40.30 mg/l; nitrites 0.02-0.21 mg/l; alkalinity 54-198 mg/l in all selected ponds. The results showed that the domestic wastes, industrial wastes, fertilizers etc. are man-made pollutants of water in the present study area. Some natural causes are biodegraded portion of animals and plants to fish, siltation by erosion of soil etc.