The dataset shows about the coverage of clean water supplied by Phnom Penh Water Supply Authority (PPWSA) in Phnom Penh and the surrounding areas for the current situation and the future in 2020. Nowadays, the PPWSA covers 13 district but the coverage areas of 9 districts are approximately from 60 to 65%. PPWSA is a water supply agent and a state-run monopoly company. The data was digitized from the annexed map of annual report 2017 of Phnom Penh Water Supply Authority with QGIS application to create a shapefile. Then the result was exported in various formats such as KML, GeoJSON, and JPEG.