A STUDY OF THE QUALITY OF HOUSEHOLD WATER TANKS IN TIKRIT, IRAQSALMA KHALID YASSINAbstract This study was conducted to assess the quality of domestic tankâs water and its suitability for various daily uses. The physical, chemical and biological characteristics give an idea of the quality of water as people resort to using household tanks for the purpose of preserving water and meeting daily needs. The results showed normal proportions allowed within the Iraqi and international water specifications according to the physical and chemical factors, but it leads to an increase in the number of bacteria in the water. The reason for contamination of household drinking water with bacteria is the residentsâ negligence of the constant cleanliness of the tanks and the lack of tight sealing of the tanks which exposes them to dust and animal excrement that interacts with the stagnant water in the ditches and it leads to the activation of bacteria. The study found the following results, the conductivity recorded the lowest value of 350 and the highest value of 690 microsomia / cm, the lowest value of dissolved oxygen was recorded 4.6 mg/l, and the highest value was recorded at 11.9 mg/l while the pH was recorded the lowest value of 6.2, the highest value of 8.8 while the total hardness ranged Between (88-225) mg/l. As for the total numbers of bacteria they increased in the winter months and decreased in the summer. |