DNREC Online, Division of Water Resources logo

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
In 2005 the Department amended the 2001 Murderkill TMDL Regulation for Dissolved Oxygen and Nutrients.

Final Amended TMDL Regulation


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

TMDL Regulation


St Jones River
The Department adopted TMDL regulations for Bacteria, Nutrients and Dissolved Oxygen in December 2006.

TMDL Analysis

TMDL Regulation


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.

 

Section Staff Directory
Division Staff Directory

Programs
Permits
Licenses
Regulations
Forms
Publications
Financial Assistance
Division Contact Guide
Public Information

FAQ

DNREC Jobs

| DNREC Home | Division Home | Top of Page |

| Delaware's Home Page | Privacy | Translate | Econ Development | Tourism |

2000 Delaware Department of
Natural Resources and Environmental Control
Division of Water Resources
89 Kings Hwy
Dover, DE 19901
(302) 739-9950

Comments? E-mail the Webmaster
Last Update: