Abstract: Having different patterns of life styles, water consumption facilities, culture and type of occupation of most of the people as well as different climate conditions in the villages of our country, have created various water requirements. So, performing separate regional studies throughout the country, it is necessary to take action to determine the design factors and elements, specially the consumed water per capita that is one of important and the most varying factors. With regard to this necessity, it has been taken action, through a studying plan, to determine the liter per capita per day (lpcd) in villages of Hamadan province and the outcome results showed that the extent of average lpcd on spring, summer, fall, winter and annual for total of statistical society were 100, 138, 110.2, 89.6 and 109.6 l per day, respectively. Also, the numerical value of seasonal fluctuation coefficient in different seasons were 0.91, 1.26, 1.01 and 0.82, respectively. One of these new effective factors that raised in villages of the country is the construction of private baths in the rural houses. According to this plan, it has been considered the effect of the this factor and its results shows increase in the average lpcd as much as 20.2 l per day for each individual and shall be considered in the further plans. Also, the results showed perceptible decrease in the average lpcd with increase on number of family’s individuals.