Description: This database shows the location of publicly owned treatment works, and other significant point source discharges to surface waters at or near the contiguous U.S. coastline. Three types of features are provided in this database; facility location, outfall pipes, and the outfall discharge point. Outfall pipes and discharge points may not be present for some facilities due to a lack of source data. A facility can be linked to its outfall pipe, discharge point and other National Pollution Discharge Elimination System records using the provided key field.