Urban, low-income households tend to receive water services from small, local providers (SLPs) as opposed to regulated water utilities. Understanding how to improve water safety among SLPs who serve low-income populations can help promote more equitable access to clean water. USAID URBAN WASH is partnering with Nairobi Water and Nairobi City County to understand how best to improve water quality among SLPs. This research plan summarizes the existing evidence on this topic and outlines the approach to address the following questions: