The Nitrogen and Phosphorus Pollution Data Access Tool (NPDAT) enables users to view and download nitrogen and phosphorus pollution data from a variety of databases. The NPDAT utilizes shared Web services, including the STORET and NWIS Mini-Portal services and numerous mapping services. It also leverages the common code base used by the EPA's Recovery Mapper, MyWATERS Mapper, and Beaches Mapper Web mapping applications. In doing so, it supports the basic tenets of the EPA's Geo-Spatial Platform initiative. In addition to shared web services, which provide real-time access to data in certain data systems, NPDAT includes information downloaded from several data systems. These were the best available to EPA at the...
