Impaired Waters and TMDLs in Region 3

EPA Region 3 serves Pennsylvania, Maryland, Delaware, Virginia, West Virginia and the District of Columbia, as well as 7 federally recognized tribal nations.

On this page:

• Public Notices
• Chesapeake Bay TMDL
• Search for specific impaired waters and TMDLs
• Current Projects
• State-specific information and actions

Contact Region 3 

Impaired Waters and TMDLs Staff

Public Notices

• WV 303(d) List Public Notice (June 2023)

Chesapeake Bay TMDL

• News, information, implementation, and progress

Search for Specific Impaired Waters and TMDLs

• For the latest surface water quality assessment decision data, please visit How’s My Waterway, or visit the ATTAINS website.

Current Projects

• Water Quality Modeling to Support Source Water and Aquatic Life Protection, Octoraro Creek, Pennsylvania and Maryland

  • This project supports water quality monitoring and development of a water quality model to guide restoration planning efforts for the Octoraro Creek Watershed.  The data and model along with tools to evaluate nutrient and sediment reduction strategies will guide Pennsylvania Department of Environmental Protection and local partners develop plans for supporting a healthy ecosystem and protecting drinking water.  For more information, please contact Ashley Geiger, project lead, at [email protected].

  • Octoraro Modeling Project Scenario Planning Meeting--January 31st, 2022 (link to recording)

  • Water Quality Model Stakeholder Meeting-- April 25th, 2023 (link to recording)

• Fish Tissue Sampling for PCBs in the Gunpowder River Watershed, Maryland

  • EPA completed fish tissue sampling for polychlorinated biphenyls (PCBs) in October 2023, in Seneca Creek, Saltpeter Creek, and the Gunpowder River. These sampling results were submitted to the Maryland Department of the Environment (MDE) for evaluation in their ensuing CWA section 305(b)/303(d) integrated reporting, as well as for consideration in Maryland’s fish consumption advisory. For more information, please contact Hunter Pates, project lead, at [email protected].

  • Fish Tissue Sampling Results (October 2023) (pdf) (150.02 KB, 07/2024)

State-specific Information and Actions

• Delaware
  • Delaware 303(d) Assessment Program
  • Delaware TMDL Program
• District of Columbia
  • District of Columbia 303(d) Assessment Program
  • District of Columbia TMDL Program
• Maryland
  • Maryland 303(d) Assessment Program
  • Maryland TMDL Program
• Pennsylvania
  • Pennsylvania 303(d) Assessment Program
  • Pennsylvania TMDL Program
• Virginia
  • Virginia 303(d) Assessment Program
  • Virginia TMDL Program
• West Virginia
  • West Virginia 303(d) Assessment Program
  • West Virginia TMDL Program

Contact information for EPA Region 3 303(d) staff can be found at Contact Us About Impaired Waters and TMDLs.