The potable (drinking) water is that water which is safe for human consumption. The analysis of drinking water determines the identification of bacteria and the effect of some other metals on them. The pathogenic effect of 12 bacteria is also studied. The work was carried out in Sri Ganganagar zone. The samples were collected from the rivers like Ganga canal, Bhakhra canal etc. sample were also taken from the areas like RIICO, Udyog vihar and villages like Lalgarh Jattan, which are just 15 to 35 km away from Sri Ganganagar. The work was completed in the department of microbiology of Tantia University, Sri Ganganagar. Isolation and cultivation of bacteria was done by using varies isolation techniques like serial dilution method, spreading etc. and applied  different media like nutrient agar, Eosin  Methylene  Blue and special agar. Two lanes were used for the identification of bacteria. Primary identification includes cell shape, staining and some Miscellaneous characters like catalase of  bacteria while in secondary identification ,the enzymatic activity of isolate were checked through a series of  biochemical tests such as Triple sugar iron agar (TSI), Enterobacteriaceae test, Aerobiological test etc. Total 12 types of organisms were identified from various samples of potable water by using Bergey’s manual flow chart. Species like E.coli (13.9%), P.vulgaris (8.6%), S.aureus (16.4%), Streptococcus lactis (2.1%), Alcaligens fecalis (10%), Enterobacter sp. (1%), Bacillus cereus (2.5%),Bacillus sp (10%), Pseudomonas aerogenosa (7.4%), Salmonella typhimurium (1.4%), Klebsiella sp. (1.7%), Micrococcus leuteus (12.6%), Shigella sp(1.4%), unidentified sp. of coccus (10.9%)were  identified from the collected samples. All the identified organisms show low potable nature of Sri Ganganagar zone water, in which most of the pathogens are found in Gang Naher and industrial area water.
Key words: Drinking water, contamination, E.coli, S.aureus.

Corresponding author: Raj Kumar Wasan, Phd student, Department of Microbiology, Tantia University Sri Ganganagar Rajasthan, India
This article may be cited as: Wasan RK, Dhuria SC. Microbiological quality assessment of drinking water at Sri Ganganagar, Rajasthan. . Int J Res Health Allied Sci 2017;3(6):4-8.