Abstract
Investigation of the bacterial factors affecting the three main drinking water purification stations (Al-Qurna, Al-Abbas, and Al-Buradieiah) located in various regions of Basrah Governorate was done. Water samples were taken monthly from September 2019 to August 2020. Water samples from the three stations, before and after purification (raw and treated water) were all subjected to microbial investigations that included estimation of the total viable microbial counts, total coliform, total fecal Escherichia coli, Salmonella and Shigella bacteria, and other dangerous bacteria that might be present. The current findings show that all of the stations under study had ineffective purification processes, resulting in pathogen levels in drinkable water that was higher than the limit set by Iraqi criteria and WHO’s desirable limits for drinking water. In the evaluation of all WTPs’ efficacy in terms of microbial elimination, the results show an efficiency rate ranging from 92.09 to 99.72.
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