Category: API

An application programming interface (API) is a set of data structures, protocols, routines and tools for accessing a Web-based software application. For more information on how the government is using APIs, please go to

Water Quality Portal API

The Water Quality Portal (WQP) is a cooperative service sponsored by the United States Geological Survey (USGS), the Environmental Protection Agency (EPA) and the...

FRS Facility Search Service

Web Service for lookup of known facilities in FRS. Accepts a set of search parameters for searching facilities, and returns XML results with data...

Envirofacts RESTful Service API

Envirofacts has developed a RESTful data service API to all of its internal data holdings. This functionality provides a user of Envirofacts with the...


The SignAndStoreCor operation is used to apply a signature to the document and store it in the shared services. Office: Office of Environmental Information,...


The RepudiateCor operation is used by the client to repudiate a COR in the archive. Office: Office of Environmental Information, OEI, USEPA


The Sign operation of the CROMERR Shared Services is invoked with the document and signature Data along with other parameters described in this section...


Allows obtaining updated IC data within a set of coordinates, or “bounding box”

Identify Service

The identify service answers the question, What information exists in EPA program data systems for this point in the surface water network? The service...


Pacific Northwest Water Quality Data Exchange