ABSTRACT The people in Ukui District, Pelalawan Regency meet their drinking water needs from bottled water, dug wells, river water and springs based on the 2018 RPIJM Pelalawan Regency. The quality and quantity of drinking water has not been guaranteed. The need for water in Ukui District in 2019-2038 is 111.24 L / sec, so it is necessary to plan a drinking water supply system for the next…