The Bronx River Watershed Coalition was formed in 2003 as a partnership among Westchester County municipalities and agencies and not-for-profit organizations seeking the same goal: to improve water quality in the Bronx River. It also helped address flood mitigation. Over time, state and New York City agencies joined the effort. The coalition developed a comprehensive watershed plan, which lays out a strategy for limiting the amount of stormwater runoff and pollutants entering the Bronx River and its tributaries.