EVALUATION THE WATER QUALITY OF SOME WATER TREATMENT IN BAGHDAD CITY/ AL-KARKH SIDE USING SEVERAL WATER QUALITY INDICES

The present study was conducted on the drinking water treatment plants located in three districts which are (Al-Qadisiyah, Al-Dora, Al-Kadhimiya) in Baghdad city. The study aims to assess the water quality produced from the above three plants using various water quality indices. Twelve physical and chemical parameters have been tested which are pH, turbidity, electrical conductivity, calcium, magnesium, chloride, total hardness, alkalinity, sulfate, sodium and total dissolved solids. Five different approaches and methodologies of water quality indices were applied to get the level of pollution during a period of nine months, starting from November 2021 until July 2022.The values WAV WQI for all water treatment pants indicate that the water quality was good. Also, the results of the MNE WQI showed that all water treatment plants produced clean water, but Al-Qadisiyah treatment plant in April, the water was very clean. The values of (weighted method) indicated that the water quality for all water treatment plants was good, but Al- Kadhimiya water treatment gives excellent water quality, and it was moderately polluted of Al-Qadisiyah plant in months of May and July .It was found that all water treatment plant studied gives excellent quality using based on values of CCME and BCWQI indices. It is found that the values of all chemical and physical parameters are within Iraqi standards. Finally, in the present study, many statistical equations were found for the purpose of calculating the water quality index for each water treatment plant studied with a proper coefficient of determinations.