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The flow of domestic wastewater (not including the groundwater infiltration or unavoidable surface water contribution) will vary continuously throughout any one day, with extreme low flows usually occurring during the break of the day and peak flows occurring during the daylight hours. This study deals with the characteristics of domestic wastewater flow in the small residential area. Especially, this study is mainly focused on the estimate of the ratio of the peak/minimum flow of the domestic component to the average for the day in the small residential area which is useful information for the sewer design and maintenance. In this study, the ratio of the peak flow to the average for the day range about from 1.4 to 2.9 and the ratio of the minimum flow to the average range about from 0.1 to 0.5