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   Updated July 5, 2017


Ecosystem Restoration of the Chesapeake Bay


The Chesapeake Bay is the largest estuary in the United
States. Its watershed comprises a 64,000 square-mile area
and includes portions of the District of Columbia and the
states of Delaware, Maryland, New York, Pennsylvania,
Virginia, and West Virginia (see Figure 1). Freshwater
enters the bay from several tributaries, including the
Potomac and Susquehanna Rivers, and drains into the
Atlantic Ocean. The bay supports thousands of wildlife
species, commercial and recreational fisheries, recreation
activities, shipping, and other commercial activity. The
health of the bay ecosystem has been a concern for
Congress and stakeholders for many years. The decline of
this ecosystem, first noticed decades ago, has been widely
attributed to urban and agricultural development and to
pollution from the bay's watershed.

Figure I. Chesapeake Bay Watershed


Source: Chesapeake Bay Foundation.
Pollution from point sources, such as sewage treatment
plants, and from nonpoint sources, such as agricultural
runoff and animal waste, has contaminated the bay waters
and ecosystem with excessive nutrients (e.g., phosphorous
and nitrogen), toxic chemicals, and heavy metals. These
substances have affected many plant and animal species and
have led to the decline of fisheries, submerged aquatic
vegetation, and dissolved oxygen levels. Increased
commercial and urban development, loss of riparian and
shore habitat, and overharvesting of fisheries have led to
additional declines in the bay's ecological health.


The economic importance of the bay and concern about the
decline of its resources are major reasons driving bay
restoration efforts. The federal government has made
significant investments in restoration activities in the bay
watershed for almost 25 years, although federal
involvement in the bay has occurred over a much longer
period of time. Current restoration activities follow the
Chesapeake Bay Agreement (Agreement), which was
signed in 1983 and last updated in 2014. Federal agencies
have made substantial commitments to this effort (in
addition to having long-standing programs and
responsibilities that affect the bay).


The Agreement is a pledge to restore the health of the
Chesapeake Bay ecosystem. From the Agreement's
inception in 1983 and latest revision in 2014, the
Chesapeake Bay Executive Council has led activities
carried out pursuant to the Agreement and its amendments.
The council and signatories to the Agreement consist of the
governors of Delaware, Maryland, New York,
Pennsylvania, Virginia, and West Virginia; the mayor of the
District of Columbia; the chair of the Chesapeake Bay
Commission; and the U.S. Environmental Protection
Agency (EPA) Administrator. The council establishes the
policy direction for restoring and protecting the bay and its
living resources. The council also is accountable to the
public for progress made under the Agreement.

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The Agreement established the Chesapeake Bay Program
(Program), which is authorized under the Clean Water Act,
as amended (CWA; 33 U.S.C. § 1267). The Program
governs restoration activities in the bay and works with
states and stakeholders through a committee structure to
develop actions and strategies for restoration. The Program
sets restoration objectives and indicators, and it implements
and reports on restoration activities. The Program office is
housed within EPA, which provides staff and funding to run
the office. Primary funding for the Program comes from
state governments. Federal funding was authorized under
33 U.S.C. §12670) at $40 million annually from FY2001 to
FY2005 to fund environmental studies and grants that
support restoration activities in the bay. Congress has
appropriated funds for the Program after the authorization
for appropriations expired in FY2005.


Although multiple federal agencies participate in bay
restoration, EPA is considered the lead agency. In 2009, the
Federal Leadership Committee was established by
Executive Order (E.O.) 13508. Members of this committee
include senior representatives from the departments of
Agriculture (USDA), Commerce (DOC), Defense (DOD),
Homeland Security, the Interior (DOI), and Transportation,


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