دراسة مسحية لتلوث مياه الشرب في محافظة كربلاء المقدسة لعام 2007

Abstract

This study aimed to determine the causes of drinking water contamination and to know which months of the year that have the higher incidence of the contamination.Sixty samples were taken from different areas of Karbala( Al- hur, Al- hindea, Hay Al- moathafeen, Hay Al- kadeer and Al- wand) and they were examined during January, Faberuary, March, April, May, and June in 2007. It was found that all these samples were contaminated with unaerobic bacteria (average number of bacteria was 200, 160, 120 for Al- hindea, Hay Al- kadeer and Al- hur) respectively . Coliform and E.coli were append in average number which varied from site to another , the highest of coliform and E.coli were 20 and 18 respectively.There was a significant difference in the incidence of water contamination between cold months (January, February and march) and hot months (April, May and June) at p value ≤0.01. There was 2 significant number of aerobic plate count (APC) total number, total coliform number and E.coli number in hot months in comparison to January.In addition, there was a high correlation coefficient between (APC) total number and total coliform number (r=0.85 at p value ≤0.01). This relationship was found also between (APC) total number and E.coli total number (r=0.86 at p value ≤0.01).Finaly, a strong correlation coefficient was found between total number of E.coli and coliform bacteria (r=0.86 at p value ≤0.01).