Survey on Microbial Quality of Drinking Water in City Maravehtapeh Villages and Comparison with National and WHO Standards

The objective of the study is survey on microbial quality of Maravehtapeh village in during September and October 1391, and its quality compared with national standards and WHO. In this cross- sectional study, the water microbial quality in 90 villages have piped city-wide network based on two criteria were assessed total and fecal coliform. 3 samples from each village were sampled during three months. Samples were survey A nine-tube fermentation test s for coliform group. For chlorine residual of diethyl – p- phenylene diamine (DPD) colorimetric method was used. In this paper, the results of date from 3 round of sampling and testing are presented. The results show that 83.64, 71.43 and 78.89% village with coverage and no coverage of Rural Waste Water Company and all maravehtapeh villages, respective, using safe water in terms of FC and 54.3, 36.37 and 43.34% village with coverage and no coverage of Rural Waste Water Company and all maravehtapeh villages, respective, using safe water in terms of TC. The results of this study express that the fecal contamination condition in under coverage village is good. But there is a bad condition in villages with no coverage of KRWWC. And the general microbial quality of drinking water in all Maravehtapeh villages of the World Health Organization and country Microbial Index is low.