Duck-Pensaukee Watershed

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Hydrologic Unit Code: 04030103

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Watershed Overview

The Duck-Pensaukee watershed is approximately 490 square miles in size and has approximately 35 miles of Lake Michigan shoreline which include several coastal wetlands. These wetlands are the most important natural features of the watershed.

Green Bay is the only urbanized area within the watershed. Since groundwater is the primary source of potable water for most of the residents within the watershed, there has been a noted drop in groundwater levels. This problem has prompted suburban areas to seek direct withdrawals from Lake Michigan as an alternative source for potable water.

The Duck-Pensaukee watershed is primarily agricultural and forested. It has more wetlands than developed areas. Between 1996 and 2001, there have been slight increases in developed land and a slight decrease in grassland and forest.

Additional information is available at Michigan State University's Institute for Water Research's Digital Watershed Tool at: This site has interactive watershed-based information on industrial facilities discharge sites, toxic release inventory, permit compliance system, water quality stations, bacteria stations, national sediment inventory stations, best management practices, water quality observation stations, weather data stations, impaired waters (reach and area), landcover change (1992-2001), landuse 2001, soil, and elevation.

Watershed Activities

The objectives for managing the Duck-Pensaukee watershed is included within the management objectives of the Upper Green Bay management basin. In addition, the Duck Creek watershed runs through the Oneida reservation which has prompted them to be active in watershed planning efforts. Some of the objectives that have been prioritized include: targeting the West Shore of Green Bay as a high priority for habitat protection, protect shoreland habitat and water quality through regulation and zoning, encourage sound forestry practices on public and private land, identify and manage terrestrial invasive exotic species.

The watershed’s activities also involve a planning aspect which includes working with local communities to implement the WDNR’s 50 year Land Legacy Study which is an acquisition plan for the state, completing a comprehensive fisheries plan for the basin, and completing a master plan for the Governor Tommy G. Thompson Centennial State Park. In addition, the development and enhancement of educational activities for forestry, water quality, wildlife management, and healthy ecosystem management are also a priority.
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Watershed Groups

For more information, see the USEPA “Surf Your Watershed” website at

The Wisconsin Department of Natural Resources manages the Duck-Pensaukee watershed in two integrated management areas. The northern portion is managed as part of the Upper Green Bay Basin and the southern portion as part of a larger Lower Fox basin. For more information, see

Information on other Lake Michigan subwatersheds can be found at:

Watershed Data and Information

USGS Water Resources Links for: 04030103 - Duck-Pensaukee

USGS State Information and Contacts:

Current Water Data:

All Water Data (Current and Historic Sites):

Other Data Links:

Current Regional/National Conditions:

Search USGS for Links, Publications and Web Sites Associated with:

EPA Links for the Duck-Pensaukee - HUC 04030103:

Impaired (303d) Waters

A listing of impaired waters can be found on the U.S. EPA website at:


Watershed Management Tools

Tools for addressing impairments in the watershed can be found at the Lake Michigan Lakewide Management Plan Watershed Tools page. Specific Lake Michigan Lakewide Management Plan Watershed Tools can be found at the following pages:

Subwatersheds of the Duck-Pensaukee Watershed

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Information on other Lake Michigan subwatersheds can be found at: Lake Michigan Subwatershed Information
HUC Watershed Name
04030103 0101 Headwaters of the Pensaukee River
04030103 0102 North Branch Pensaukee River
04030103 0103 Pensaukee River
04030103 0104 Kirchner Creek-Frontal Green Bay
04030103 0201 Headwaters Little Suamico River
04030103 0202 Little Suamico River
04030103 0203 Tibbet Creek-Frontal Green Bay
04030103 0204 South and West Branches of the Suamico River
04030103 0205 North Branch Suamico River