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In Egypt, Water from the Nile River has a considerable importance because it is generally used for drinking, agriculture and other human or economic uses. Water purification processes have a lot of problems which produce drinking water do not match with WHO standards and cause a lot of healthy risks such as kidney failure and microbial infection to populations. This study aims to assessment of drinking water quality after purification process, detect pollutants and match its specifications with WHO standards. Drinking water samples were collected from different 23 locations inside Qalyubia government, Egypt. Physical, Chemical and Microbiological parameters were measured according to modern techniques that used in drinking water assessments. The microbiological determinations results were reported to exist total coliform and fecal coliform bacterial count which recorded high value in sample (Q 14) as 16.3 CFU/ 100 ml and 8 CFU/ 100 ml respectively, also total bacterial count at 37 0C and 22 0C recorded 208 CFU/ 100 ml and 144 CFU/ 100 ml respectively. WHO standards were recorded zero value in total bacterial count at 37 0C and 22 0C, total coliform and fecal coliform bacterial count and then drinking water sample in this study do not match with WHO standards in microbiological determinations . Additionally, Physical parameter results such as pH, TDS and Turbidity were observed high value in samples Q15, Q18 and Q3 which recorded 7.9, 613 ppm and 2.1 NTU respectively. Also, Chemical parameters results such as (Total Hardness, Calcium Hardness, Magnesium Hardness, Calcium, Magnesium, Chloride, Sulfate, Ammonia, Nitrite, Nitrate, Iron, Manganese and Aluminum) were observed high value in samples (Q18, Q18, Q17, Q18, Q17, Q18, Q18, Q10, Q5, Q12, Q3, Q3 and Q7) respectively. All physical and chemical parameters were matched with WHO standards except pH and Aluminum values recorded high value greater than standards. To detect pollutants, heavy metals were measured and results such as (Arsenic, Cadmium, Chromium, Lead, Mercury, Nickel and Selenium) were observed high value in samples (Q10, Q10, Q19, Q10, Q21 and Q21) respectively which matched with maximum range value of heavy metals standards according to WHO standards. The results concluded that there are contamination in drinking water with sewage microorganisms and detect heavy metals pollutants so water purification processes in Qalyubia government are facing a problem and must solve it. |
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