Assessment of microbial contamination in drinking water supplies Qazvin city (2013-14)

Background: Providing safe drinking water and monitoring the quality are necessary in the human societies. Objective: The aim of study was to evaluate the microbial quality of groundwater of Qazvin city. Methods: This cross-sectional study was performed to evaluate the microbial quality of 45 drinking water resources Qazvin city in terms of total coliform and fecal. Sampling was done in the winter to spring during 2013-14. Sample analysis was performed using standard multiple tube fermentation (3 tubes) method for total coliform and fecal counting. Findings: Total coliform and fecal concentration were zero in all taken samples and all samples were free of microbial contamination of total and fecal coliform. Conclusion: Microbial quality of drinking water supplies of Qazvin city was favorable in terms of total and fecal coliforms and in accordance with the standards of the country in relation to microbial contamination, But in order to maintain the desirability, continuous monitoring of the water and wastewater company is very important on the quality of the supply sources of drinking water.