State of Delaware's TMDL Program
What is a TMDL?
Section 303(d) of the Federal Clean Water Act (CWA) requires States to develop a list (303(d) List) of waterbodies for which existing pollution control activities are not sufficient to attain applicable water quality standards and to develop Total Maximum Daily Loads (TMDLs) for pollutants of concern. A TMDL sets a limit on the amount of a pollutant that can be discharged into a waterbody such that water quality standards are met.
TMDL Activities:
| Completed TMDLs | Upcoming TMDLS | Documents |
Documents
Documents are made available in .pdf format, which requires the free download
of Adobe Acrobat
Viewer.
Upcoming TMDLs:
Red Clay Creek
The Department is proposing to modify the Zinc TMDL for Red Clay Creek.
Completed TMDLs:
Appoquinimink River
The US EPA Established a TMDL for Dissolved Oxygen in the main stem of the
Appoquinimink River January 30, 1998. EPA Documents are
here.
The Appoquinimink TMDL was updated in December 2003 to address nutrient and
dissolved oxygen impairments of the tributaries and ponds within the watershed.
The EPA documents for the 2003 updated Appoquinimink River TMDL can be found
here.
The Department adopted a Bacteria TMDL in the Appoquinimink Watershed in
December 2006.
Final Appoquinimink River
Bacterial TMDL Regulation
Appoquinimink River Bacterial TMDL Analysis
Army Creek
The Department adopted TMDL regulations for Bacteria, Nutrients and
Dissolved Oxygen in December 2006.
TMDL Analysis
TMDL Regulation
Blackbird Creek
The Department adopted TMDL regulations for Bacteria, Nutrients and
Dissolved Oxygen in December 2006.
TMDL
Analysis
TMDL Regulation
Broadkill River
The Department adopted TMDL regulations for Bacteria, Nutrients and
Dissolved Oxygen in December 2006.
TMDL Analysis
TMDL Regulation
Buntings Branch
EPA Approved the
Department's TMDL
Analysis on December 15, 2004.
Chesapeake Bay Drainage Basin (Chester River, Choptank River,
Marshyhope Creek, Nanticoke River, Gum Branch, Gravelly Branch, Deep Creek,
Broad Creek and Pocomoke River watersheds)
TMDLs for Bacteria were adopted in December of 2006.
Chesapeak Drainage Basin
TMDL Bacteria Regulation
Chesapeak Drainage Basin TMDL Bacteria
Analysis
Cedar Creek
The Department adopted TMDL regulations for Bacteria, Nutrients and
Dissolved Oxygen in December 2006.
TMDL Analysis
TMDL Regulation
Chester, Choptank, Marshyhope and Pocomoke River Watersheds
The Department adopted nutrients, dissolved oxygen, and bacteria TMDLs for
the Chester, Choptank, Marshyhope and Pocomoke River Watersheds in December of
2005.
TMDL Analysis for Chester,
Choptank and Marshyhope Rivers
TMDL Analysis for Pocomoke River
Secretary's Order, Department's Response to Comments, and TMDLs Regulations
The Bacteria TMDLs were updated in December 2006 (see the Chesapeake
Bay Drainage Basin TMDL section above)
Christina River Basin
The US EPA established a
Total Maximum Daily Load for Nutrients and Dissolved Oxygen Under
Low-Flow Conditions in the Christina River Basin, Pennsylvania, Delaware, and
Maryland January 19th, 2001 and is currently in the process of revising the
TMDL.
The US EPA established a
Total Maximum Daily Load for Nutrients and Dissolved Oxygen Under
High-Flow Conditions in the Christina River Basin, Pennsylvania, Delaware, and
Maryland April 8, 2005
Delaware Estuary
The DRBC, US EPA, Delaware, New Jersey and Pennsylvania have developed a
TMDL for PCBs in the Tidal portions of the Delaware River, zones 2 through 5.
Related documents are here.
Dragon Run Creek
The Department adopted TMDL regulations for Bacteria, Nutrients and
Dissolved Oxygen in December 2006.
TMDL Analysis
TMDL Regulation
Indian River
US EPA promulgated a TMDL for Temperature in the Indian River. EPA documents
are here.
Inland Bays
The Department adopted Nutrient TMDLs for the Indian River, Indian River Bay
and the Rehoboth Bay on December 10th, 1998. EPA Documents are
here.
Final
Regulation
TMDL
Analysis Table of Contents and Executive
Summary, or the entire
document
The Department's responses
to comments received during Public Workshops and the Public
hearing.
The department Adopted Bacteria TMDLs for the Inland Bay Drainage Basin in
December 2006.
Final Bacterial Regulation
TMDL Bacterial Analysis
Leipsic River
The Department adopted TMDL regulations for Bacteria, Nutrients and
Dissolved Oxygen in December 2006.
TMDL Analysis
TMDL Regulation
Little Creek
The Department adopted TMDL regulations for Bacteria, Nutrients and
Dissolved Oxygen in December 2006.
TMDL Analysis
TMDL Regulation
Little Assawoman Bay and Tributaries of the Indian River, Indian River Bay and
Rehoboth Bay:
The Department adopted Nutrient TMDLs for the Little Assawoman Bay and
Tributaries of the Indian River, Indian River Bay and Rehoboth Bay that became
effective January, 2005.
Final Regulation
TMDL Analysis
Mispillion River
The Department adopted TMDL regulations for Bacteria, Nutrient and Dissolved
Oxygen in December 2006.
TMDL
Analysis
TMDL Regulation
Murderkill River
Technical Analysis for Amendment of the 2001 Murderkill TMDL
Secretary's Order, Department's Response to Comments, and TMDLs Regulations
The Depatment adopted a Bacteria TMDL regulation for the Murderkill Watershed in
December 2006.
Final
Bacterial Regulation
TMDL Bacterial Analysis
Naamans Creek
The Department adopted Nutrients, Dissolved Oxygen, and Bacteria TMDLs for the
Naamans Creek watershed in December 2005.
Total Maximum Daily Loads (TMDLs)
Analysis for Naamans Creek
Secretary's Order, Department's Response to Comments, and TMDLs Regulations
Mainstems of the Nanticoke River and Broad Creek
The Department adopted Nutrient TMDLs for the Nanticoke River and Broad Creek
in 1998.
Final Regulation
TMDL Analysis Table of Contents and Executive
Summary, or the entire
document.
The Department's
responses to comments received during Public
Workshops and the Public Hearing.
The Department Adopted Bacteria TMDLs in December 2006. (See the Chesapeake
Bay Drainage Basin TMDL section above)
Nanticoke River and Broad Creek Tributaries
The Department performed a TMDL Analysis for
Tributaries and Ponds of the Nanticoke River and Broad Creek in 2000.
The Department Adopted Bacteria TMDLs in December 2006. (See the Chesapeake Bay Drainage Basin TMDL section above)
Red Clay Creek
The Department adopted a TMDL for zinc in the Red Clay Creek in 1999.
Final Regulation
Technical Background and Basis Document
The Department's Responses to comments received during Public Workshops and the Public Hearing.
Red Lion Creek
The Department adopted TMDL regulations for Bacteria, Nutrients and
Dissolved Oxygen in December 2006.
TMDL Analysis
TMDL Regulation
Shellpot Creek
The Department has adopted Nutrients, Dissolved oxygen, and Bacteria TMDLs for
the Shellpot Creek watershed in December 2005.
Total Maximum Daily Loads (TMDLs)
Analysis for Shellpot Creek, Delaware
Secretary's Order, Department's Response to Comments, and TMDLs Regulations
Smyrna River
The Department adopted TMDL regulations for Bacteria, Nutrients and Dissolved
Oxygen in December 2006.
TMDL Analysis
St Jones River
The Department adopted TMDL regulations for Bacteria, Nutrients and Dissolved Oxygen in
December 2006.
TMDL Analysis
White Clay
Creek
The Department adopted a TMDL for Zinc in the White Clay Creek November 11,
1999
Final
Regulation
Technical Background and Basis Document
The
Department's Responses to comments received during Public
Workshops and the Public Hearing
Other Currently available documents include:
DOCUMENTS:
The Department Watershed Assessment Reports (305(b) Reports) and Lists of
Waters Requiring TMDLs (303(d) Lists) page is
here.
Whole Basin Management Plan and Timeline and TMDL Development Process Schedule.
Internal Link
Delaware's Tributary Action Teams are developing Pollution Control Strategies to implement approved TMDLs. Their web page is here.
External Links
The Federal Environmental Protection Agency TMDL Web page.
EPA Region 3 TMDL Web page. Delaware works with this Region to complete its TMDLs.
This page authored by
Dave Wolanski. Last Modified March 1, 2006.
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