Skip to main content

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( focusable="false" ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Site types

The hydrologic cycle setting or a man-made feature thought to affect the hydrologic conditions measured at a site. Primary and secondary site types associated with data collection sites. All sites have a primary site type, and may additionally have a secondary site type that further describes the location.

metadata features

  • Browse the data

    Explore site types observations in your browser! Requests made in a browser will default to returning HTML responses; add f=json to your query to always get the JSON response.

  • Read the docs

    The OpenAPI documentation lists available query parameters and has a helpful query-builder interface you can use to bootstrap your requests.

  • See the data dictionary

    Field names, types, and definitions are provided as both an HTML table and a JSON schema file.

Other links

Reference Systems