The purpose of this study are: detecting my school (new Long Campus) whether the microbial contamination of water, on which the micro-organisms to select the appropriate culture conditions and determination, and a parallel experiment averaged to determine the extent of contaminated tap water. Method: Yancheng Teachers College (New Long Campus) tap water samples within the sample to the sampling location, sampling method, sample treatment before sampling was distinguished; according to GB 4789.2-2010, GB 4789.3-2010 method of testing, according to GB 5749 -2006 "drinking water health standards " as the criterion of the test results. Colony count and coliform bacteria that is considered one of unqualified failure. Another: To enrich the content and increase the detection of the practical significance of this experiment, testing the tap water samples of mold, yeast infection levels, PH, smell and taste, residual chlorine concentration. Results: 30 bottles of water were detected, with a pass rate of 90%. Test results show that rarely clean tap water when most microorganisms; little boiling water microorganisms; tap water after disinfection taken correctly, with a little micro-organisms. Conclusion: The need to boil water to drink the best, always clean up the tap to prevent microbial growth and metal rust.
Key words: water, microbial indicators, microbiological testing, microbiological analysis