Microbiological quality of drinking water of Jahangirnagar University was studied. In the disease prone, humid, tropical region of Bangladesh, outbreaks of diarrheal diseases, often in an epidemic scale, are not unusual. Samples were collected from water tap of different academic buildings, Student dormitories, small food shops that developed in the campus, etc. The HPC (Heterotrophic Plate Count) ranged from 486 to 665 cfu/ml, from 298 to 1520 cfu/ml, and from 372 to 1002 cfu/ml for the water samples collected from the sampling sites respectively. None of the samples were found compliant with microbiological standards as recommended by the World Health Organization (WHO) in terms of total coliform counts (TCC). The ranges of TCC were 2- 0.52x10 2 cfu/100ml, 2-8.94x10 2 cfu/100ml, and 5-2.56x10 2 cfu/100ml in case of academic buildings, student dormitories, and food shops respectively. The average TCC and Fecal Coliform Count (FCC) were worst in the case of food shops and the better case was for academic buildings. Protection of any drinks from deleterious microbial contaminants is a global issue. Each year millions of people throughout the world become ill, and thousands die, from contaminated food and drinking water (Tryland et.al, 2003). Gastrointestinal illnesses of different orders are the most common symptoms for the ground water and surface water systems. Among which a number of pathogenic microbes such as E. coli, Salmonella, Shigella, Bacillus, Pseudomonus, Streptococcus etc. contaminating water may cause diarrhea, enteric fever, dysentery, and other severe illness (Frobisher et.al., 1974). Bangladesh is a diarrhea prone country where dysentery and cholera are also a major health concern. About 70% of world's diarrheal diseases are of food borne. Water is also considered as major route for this disease, especially in less developed countries. Apparently, clear water without taste and odour may be a potential carrier of pathogenic microorganisms and can danger health and life of human beings. Water receives microorganisms from air, soil, sewage, organic wastes, dead plants and animals etc. The majority of bacteria found in water belongs to groups: fluorescent bacteria (e.g: Pseudomonas sp, Alginomonas sp), chromogenic rods (Xanthomonas sp etc.), coliform groups (E. coli, Aerobacter, etc.), proteus group, non-gas forming, non- chromogenic, and non-spore forming rods, spore formers of Bacillus and pigmented cocci. Testing of water drinks including beverages like bottled water and carbonated soft drinks for bacteria has received increasing attention from consumers and public regulatory bodies with purpose of mainly to identify the presence and risk of presence of bacteria dangerous to public health. Because of the large number of possible hazards in drinking water the development of standards for drinking water requires significant resources and expertise, which many countries are unable to afford. Fortunately, guidance is available at the international level. Comparatively the water supply in the Jahangirnagar University campus is safe. But, a number of sudden diarrheal incidences in near past reveals some sorts of faults in the supply system management. Moreover, now a day, a tendency among the students have been developed to take their food stuffs including regular lunch and dinner in small shops developed many where in the university campus which don't have their any water supply from the university's water pumps. Thus there is a probability of unhygienic practices in handling and storing waters in their limited resources which may pose a health risk particularly for the students. Therefore, the present study was undertaken to determine the bacterial quality of drinking waters in the Jahangirnagar University campus. *Corresponding author E-mail: akond316@yahoo.com