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Watershed Implementation Plans - Chesapeake Bay

The EPA has issued a Total Maximum Daily Load (TMDL) for the entire Chesapeake Bay watershed spanning six states (New York, Pennsylvania, Delaware, Maryland, West Virginia, Virginia) and the District of Columbia. The Bay TMDL is a 'pollution diet' that sets a maximum loading of Nitrogen, Phosphorous and Sediment that each jurisdiction can release to its waters which reach the Chesapeake Bay. A TMDL was issued because the goals of the previous Chesapeake Bay Agreements aimed at cleaning up the Bay were not met according to the deadlines set in the Agreement.

The District supports the EPA's goals contained in the Bay TMDL, and hopes that this TMDL tool will help curb pollution reaching the Potomac and Anacostia rivers and Rock Creek from upstream jurisdictions. The District's Watershed Implementation Plan (WIP) identifies details of actions explaining how DC will achieve and maintain the water quality benefits outlined in the Bay TMDL. The WIP also provides transparency and accountability throughout the Bay TMDL process.

Two-Year Milestones [PDF]

  • 2009 - 2011 Milestones
  • 2009 - 2011 Final Progress Report
  • 2012 -2013 Two-Year Milestones

Phase I Watershed Implementation Plan [PDF]

  • DC Watershed Implementation Plan, Phase I
  • 2011 Two-Year Milestones

Phase II Watershed Implementation Plan

Bay TMDL Timeline

Phase 1

  • Draft Phase I DC WIP - September 1, 2010
  • Final Phase I DC WIP - November 29, 2010
  • EPA Issues Bay TMDL - December 31 2010

Phase II

  • Draft 2012-2013 Milestones - November 1, 2011
  • Draft Phase 2 DC WIP - December 15, 2011
  • Final 2012-2013 Milestones - January 6, 2013
  • Final Phase 2 DC WIP - March 30, 2012

Useful Links:

Please direct all comments or questions related to the DC WIP to: Diane Davis; or Sarah Sand;

Contact TTY: