Important: This view allows you to query a relatively small amount of catchments. It is possible to select large areas, but it will take an extended period of time to draw the catchment boundaries, depending on the query size. To generate larger queries, use the non-map version by clicking on the icon.

Click anywhere on the map to show a watershed catchment and the associated COMID. Holding Control (ctrl key) while clicking enables selecting multiple catchments. Use the drawing buttons on the left of the map to select larger areas.

COMIDS: Stream segment unique identifier. More information can be found in the StreamCat Dataset Readme.

For a searchable list of all currently available metrics click here.

You can switch to a text-only view by clicking on the icon. This alternate view allows you to query much larger areas such as counties, states, or hydro regions.

You can view these instructions at any time by clicking the icon.