StormwaterPrint is a Geographic Information System (GIS) application developed by the Maryland Department of the Environment (MDE) in support of the MD iMap initiative (One State-One Map). It highlights the efforts being undertaken by the State and county and municipal stormwater management programs to control urban water pollution. The aim is to provide planners, government authorities, and the public with critical data and analyses that will help with decision-making and provide public outreach. The data collected include locations of various stormwater Best Management Practices (BMPs) throughout Maryland, as well as water quality data from chemical monitoring sites where Maryland’s municipal separate storm sewer system (MS4) counties have been performing chemical monitoring for more than two decades.