Abstract:
The present study was conducted to
investigate the impact of wastewater received from Savar
Tannery Industrial Estate into the Dhaleshwari river
through the present status of water quality and pollution
level. The water samples were collected from five
different points, outfalls of the wastewater generated in
the industrial estate, during post-monsoon and dry
season from October 2019 to February 2020 and analyzed
for six physico-chemical parameters. The observed
values of pH, electric conductivity (EC), total dissolved
solids (TDS), turbidity, dissolved oxygen (DO) and
biochemical oxygen demand (BOD) were temporally
varied from 6.8-8.06, 505.44-1544.4 µS/cm, 162-495 mg/l,
10.06-27.12 NTU, 1.3-3.96 mg/l and 8.20-13.432 mg/l
respectively. The results were compared with guideline
values and previous studies that were performed on this
river of late. The river water was found to be significantly
polluted and unsuitable for aquatic organisms living in
the water body due to the occurrence of high level of
BOD. The necessity for long-term monitoring combined
with further investigation involving other parameters is
highlighted.
