This document discusses private sector engagement in Iowa watersheds to improve water quality. It describes the Agriculture's Clean Water Alliance (ACWA), a group of agribusiness retailers that works to reduce nutrient loss from agriculture. ACWA has various programs to monitor water quality, implement edge-of-field practices like bioreactors and cover crops, and engage retailers to encourage farmer participation. The Farm to River Partnership pays retailers an incentive for each conservation practice their clients adopt. Initial results include cover crops, bioreactors, and water monitoring sites. The document advocates training retailers to discuss opportunities and expanding the program.