WATER SUPPLY SYSTEM AND WATER QUALITY ASSESSMENT OF LIQVAN VILLAGE USING WATER SAFETY PLAN

摘要

The aim of this study was to identify probable risks and threatening hazards to drinking water quality of the Liqvan village, Tabriz County, along with assessment of river bank filtration of the village.In the present study all risks and probable hazards were identified and ranked and finally for each of these cases, practical suggestions for removing or controlling of them were given. To assess potable water quality in Liqvan village, samplings were done from different parts of the village and physicochemical parameters were measured. To assess efficiency of bank filtration system of the village, independent T-test was used to compare average values of parameters in river and treated water.One of the probable sources of pollution in this study was domestic wastewater which is threatening water quality. The results of this study show that bank filtration efficiency in water supply of the village is acceptable.Although Bank filtration imposes fewer expenses on governments, it provides suitable water for drinking and other uses. However, it should be noted that these systems application should be done after a thorough study of water pollution level, types of water pollutants, soil properties of the area, soil percolation and system distance from pollutant sources.