Kumari Shashi Prabha* & Arun Kumar
University Department of Zoology, B.N.Mandal University, Madhepura, Bihar, India
Received : 27th December, 2019 ; Revised : 1st February, 2020
Abstract: The present investigation was carried out to evaluate organic pollution level from different water samples in vicinity of Madhepura district. A total of 16 water samples were collected from different source. The sources were Ganga (4), Kosi (4), Waste water (4) and tube well (4) from different localities. All the collected samples were subjected to use quality parameters viz pH, dissolved oxygen, biological oxygen demand, chemical oxygen demand and chlorine following standard methods of BIS. Dissolved oxygen value ranged between 4.05-9.3 mg/l. Biological oxygen demand ranged between 1.85-3.8 mg/l. Chemical oxygen demand value between 3.2-95.3 mg/l and chloride value ranged between 1.85-76.82 mg/l.