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Spatial and Temporal Variation of Physicochemical and Microbial Quality of Drinking Water for the Distribution Network in Maku, Iran Publisher



Asghari FB1 ; Pakdel M2 ; Mohammadi AA3 ; Yousefi M1
Authors
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Authors Affiliations
  1. 1. Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Neyshabur University of Medical Sciences, Neyshabur, Iran
  3. 3. Department of Environmental Health Engineering, Neyshabur University of Medical Sciences, Neyshabur, Iran

Source: Desalination and Water Treatment Published:2019


Abstract

The objectives of this research were to assess the chemical and microbial quality of drinking water in Maku, Iran, and compare it with the national standard, as well as determine the spatial distribution of the chemical quality parameters of drinking water for warm and cold seasons using the geographical information system software. In this study, 136 drinking water samples were collected from 36 points of the distribution network in two successive years of 2016 and 2017 in warm and cold seasons. Paired-samples and Pearson correlation tests were used to examine the correlation between residual chlorine values and microbial parameters. Based on the findings of this study, the average concentration of all parameters in Maku distribution network falls within the national standard, except for turbidity. According to the zoning maps of drinking water, turbidity and hardness concentration are greater in warm than cold seasons. Results revealed that the mean heterotrophic bacteria (HPC) of samples in cold and warm seasons equaled 7 ± 11 cfu/ml and 29 ± 61 cfu/ml, respectively. According to the results of the paired-samples test, there was a significant correlation between the HPC values measured in two cold seasons and years for the samples (p-value = 0.012). It is recommended that respective agencies ensure the availability of chlorine residual at the consumer end. © 2019 Desalination Publications. All rights reserved.
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