Each drainage has a unique Hydrologic Unit Code (HUC). The most current national HU dataset is the Watershed Boundary Dataset (WBD). HUCs from other sources might be out of date or differ from the WBD standards.

Feb 6, 2014 · Esri Canada, Esri, HERE, Garmin, USGS, NGA, EPA, USDA, NPS |

Each unit is identified by a unique hydrologic unit code (HUC) consisting of two to eight digits based on its classification. The Hydrologic Unit Maps site provides information and data for current and historical hydrologic units, names, and numbers.

This document establishes Federal standards and procedures for creating the WBD as seamless and hierarchical hydrologic unit data, based on topographic and hydrologic features.

Find a hydrologic unit on the map and click to get its Hydrologic Unit Code (HUC). Zoom to HU12 to get a link to EPA How's My Waterway. Select an HU12 to get the link to the EPA "How's My Waterway" report for that hydrologic unit.

HUC 2s, 6s, 8s, 10s, & 12s, define the drainage Regions, Subregions, Basins, Subbasins, Watersheds and Subwatersheds, respectively, across the United States.

Feb 16, 2019 · Watershed boundaries define the aerial extent of surface water drainage to a point. The intent of defining hydrologic units (HU) for the Watershed Boundary Dataset is to establish a base-line drainage boundary framework, accounting for all land and surface areas.

Abstract: This file contains Hydrologic Unit (HU) polygon boundaries for the United States, Puerto Rico, and the U.S. Virgin Islands.

Apr 22, 2017 · The Watershed Boundary Dataset (WBD) is a comprehensive aggregated collection of hydrologic unit (HU) data consistent with the national criteria for delineation and resolution. It defines the...

Mar 22, 2022 · HUC is the acronym for Hydrologic Unit Code (HUC). It is a hierarchical land area classification system created by the United States Geological Survey (USGS) that is based on surface hydrologic features in a standard, uniform geographical framework.