The Drinking Water mapping Application (DWMA) provides EPA with Web-based tools to generate reports and maps vital to managing drinking water programs under the Safe Drinking Water Act. The DWMA is an application within EPA's Watershed Assessment, Tracking & Environmental Results (WATERS) architecture that uses ESRI ArcIMS, the Oracle database, GIS maping layers using ESRI's SDE, and external image and feature layers from EPA, the USGS, and the Microsoft TerraServer.
Using GIS to protect drinking water
Cooter, W., Rineer, J., Boezio, D., Rao, S., & Anzzolin, AR. (2006). Using GIS to protect drinking water. In C. Thomas (Ed.), Standards for Success: GIS for Federal Progress and Accountability ESRI Press.