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Upper Patuxent Watershed

Upper Patuxent River Watershed

Watershed Description

The Upper Patuxent Watershed in the southwestern portion of the County along a border shared with Prince George’s County. It includes the communities of Laurel, Maryland City, Brockbridge Estates, Parkway Village and Woodwardville.

The watershed is part of Maryland’s Patuxent River basin. The Patuxent River basin drains approximately 900 square miles of land, including portions of Anne Arundel, Baltimore, Calvert, Charles, Howard, Prince George’s, Montgomery, and St. Mary’s Counties.
The portion of the watershed within Anne Arundel County drains approximately 22,590 acres, contains approximately 90 miles of perennial streams and is divided into 19 sub-watersheds. Major tributaries include Davidsonville Branch and Stocketts Run. 

Impervious surfaces represented by roads, building footprints, parking lots and other hard surfaces cover approximately 6% (~1,263 acres) of the Upper Patuxent watershed. A large portion of the northern section of the watershed contains the Patuxent Wildlife Research Center. Other major landmarks include Laurel Park, Renditions Golf Course and several County parks including Bell Branch Park, Davidsonville Park, Patuxent River Park and Riverwood Park.

Watershed Assessment

The Watershed Protection and Restoration Program utilizes a watershed based approach to restoring and protecting our waterways. Assessments are conducted on each of the 12 primary watersheds to evaluate water conditions, establish priorities and goals for improvement, and take actions designed to restore or protect water quality.

A comprehensive watershed assessment for the Upper Patuxent watershed has been completed. The reports include a discussion of the water quality problems and sources of pollution and strategies for improving the water quality in the watershed. Click here to read more.

Local Watershed Organizations

Successful conservation and preservation of Anne Arundel County's watersheds takes teamwork. Here is a list of organizations that work to protect the Upper Patuxent watershed:

Patuxent Riverkeeper
Scenic Rivers Land Trust
Anne Arundel County Watershed Stewards Academy


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