Cheung Ek Lake receives 80% of Phnom Penh’s urban wastewater. Since most of the lakes around Phnom Penh are being reclaimed for urban development, surveys were undertaken to analyze the direct-use economic value of Cheung Ek lake in the dry season, which could serve for policy-makers’ future considerations. The direct-use value was assessed by summing total income of all activities performed on the lake.