This document discusses corruption in procurement processes for water and sanitation projects. It provides examples of corruption that occurred with the Lesotho Highlands Water Project, including bribery in contract awarding. Procurement is identified as being at high risk for corruption due to factors like its size, complexity, and competition. The document outlines stages in procurement where corruption risks are highest and provides some best practices to reduce corruption, including integrity pacts where bidders and governments pledge not to engage in bribery.