This publication by the Asian Development Bank's Office of Anticorruption and Integrity shares lessons from reviews of 12 projects in the water sector. It outlines how to identify and address control weaknesses that give rise to integrity risks in procurement, contract administration, and financial management. It aims to help stakeholders and those engaged in designing and implementing projects to learn from past vulnerabilities and establish processes to effectively mitigate integrity risks. Additional publications in the Integrity Risks and Red Flags series share insights from work in other sectors.