Phnom Penh’s ever expanding population needs to be supplied with water. The Phnom Penh Water Supply Authority (PPWSA) has successfully been working over the years to meet the growing demand. The water treatment plant in Niroth is currently expanded and two new treatment plants are “in the pipeline” in Chamkar Mon and Preak Leap. Inros Lackner has assisted PPWSA and its partners SAFEGE and VINCI by providing surveys and geotechnical investigations.