This paper should be cited as: Zafarzadeh, A. Amanidaz,
N. Seyedghasemi, N.
Relationship between
Turbidity and Residual Chlorine and Microbial Quality of Drinking Water
Zafarzadeh, A. (PhD)1, Amanidaz, N. (BSc)2, Seyedghasemi,
N. (MSc)3
1. PhD of Environmental Health Engineering, Research
Center for Environmental Health, Golestan University
of Medical Sciences, Gorgan, Iran
2. MSc Student of Environmental health engineering, Golestan University of Medical Sciences, Gorgan, Iran
3.
MSc of Biostatistical, Aliabad Health Center, Golestan University of Medical Sciences, Gorgan, Iran
Abstract
Background
and Objective: Safe drinking
water is essential for health and health promotion is dependent on providing safe water.We aimed to determine the relationship
between turbidity & residual chlorine and microbial quality of drinking
water in Agh ghala.
Material and Methods: In this descriptive-analytical study, 2079 water samples were collected
from water networks of 78
villages and urban network using census sampling during two years.Both sampling and tests were performed on the basis of standard methods.
Results: In more than 96 percent of the villages (N =75), above 90% of the
samples hadn’t any fecal coliform bacteria except three villages that had the
index in the range of 85 to 88 percent. Residual chlorine had significant
relationship with coliform and fecal coliform (P ≤ 0.05) while the
relationship between turbidity and coliform contaminants, fecal coliform and
residual chlorine was not significant.
Conclusion: Total coliform and fecal coliforms
were reducing by increasing residual chlorine in the water supply networks. It has been suggested that the officials reduce the water turbidity
and annual washing of the water network to increase the effect of residual
chlorine and decrease bacterial contamination.
Keywords:
Agh Ghalla, Fecal Coliform, Coliform,
Residual Chlorine
Corresponding Author: Amanidaz, N.
Email: amanidaz_n@yahoo.com
Received: 15 Oct 2013
Revised: 22 May 2014
Accepted: 24 May 2014