الفهرس 
Chapter (1): INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The aim of this study this study was conducted to evaluate water quality of some drinking water treatment plants in Damietta governorate, including the inlet fresh water of the River Nile and the outlet drinking water in addition to nine points of three distribution (tap water) networks for three treatment plants located on the Nile and the performance efficiency of drinking water treatment plants in Damietta Governorate, Egypt through analyzing some physicochemical parameters (Turbidity, total dissolved solids, electrical conductivity, temperature, pH, chlorides, alkalinity, residual chlorine, calcium, magnesium, total hardness, ammonia, sulfate, heavy metals ( iron, lead, cadmium and zinc) and bacteriological parameters ( total bacterial count, total coliform, fecal coliform and fecal streptococcus) using the standard methods for examining water and wastewater as outlined in the APHA (2017) guidelines. Water samples were collected from 11 treatment plants located at River Nile and nine points of three distribution (tap water) networks were analyzed seasonally through the year 2022. Water quality and heavy metal pollution indices were employed to assess the status of water quality. One-way ANOVA was applied to compare the spatial and temporal variation of WQI. In conclusion, all the investigated parameters were within the permissible limits according to WHO (2017) and ES (2007). The drinking water treatment plants in this study have a good quality. The study recommends regular monitoring and auditing the quality of drinking water to avoid waterborne diseases and keep the consumers’ health starting from the source intake (River Nile and its branches), treatment plants, purification stages like filtration and disinfection, transformation to the distributed pipes to the final stage households of the consumers as a final product to insure sustainable and safe water.