Assessment of drinking water quality of some reverse osmosis (R.O) plants in Al-Diwaniya Governorate Iraq by CCME WQI

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Ahmed Shakir alkhair Al-Gayyim
Raid Kadhim Abed Al-asady


Diwaniyah City, CCME WQI, Physical, Chemical and Microbial Water Properties, Iraqi Standard Specifications, Reverse Osmosis water


The study conducted to use of the CCME WQI to Evaluation the quality of drinking water treated by reverse osmosis R.O. It covered the governorate of Al-Diwaniya and some of its districts (Hamza - Afak – Shamiya) water samples were collected monthly from 13 selected stations starting from August 2022 until October of the same year. Some physical, chemical and microbial factors of water were studied before treatment (tap water) and after treatment by reverse osmosis method, the results showed that the physical and chemical factors of tap water and treated water is within the Iraqi standard and the World Health Organization specification and did not exceed the permissible limits except pH, calcium and nitrates, as low results were recorded in some stations and high Total hardness permissible limit in some stations ,The results of the bacterial tests indicated the presence of bacterial contamination of the Diwaniyah River water and the absence of tap water and treated water from bacterial contamination. In this study, the water quality guide (CCME WQI) was used to evaluate water for drinking purposes, it was clear through the results that tap water is into the category (acceptable - good) and reverse osmosis treated water within the category (marginal - good) during the study period.

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