Detection of Biological Contamination in Drinking Water Tanks and Sediments in some Areas of Mosul

This study was conducted in 10 selected areas, three on the east side of Mousl city, west City and four areas Badoush which affiliated to center Mousl. Some physical chemical tests were performed water samples, such as pH electrical conductivity, because their importance impact properties water. The results showed that values ranged between ( 7.5 – 8.4 ), conductivity 263.3 392.4 ) µs/cm, biological also presence small number unsatisfactory TPC bacteria all samples while no numbers fecal coliform or any other pathogenic appeared, some types fungi appeared 7 one sample had a type yeast tow free yeast.The within permissible limits according Iraqi international standard, for there are determinations about them specifications. Keywords: drinking tanks, fungi, bacteria, contamination.