Correspondence and Guides Regarding the Chesapeake Bay TMDL

The following is a list of important correspondence sent by EPA to the Bay jurisdictions outlining the Chesapeake Bay TMDL development and EPA's expectations for Watershed Implementation Plans (WIPs) and milestones. Bay jurisdictions include Delaware, Maryland, New York, Pennsylvania, Virginia, West Virginia and the District of Columbia.

• November 7, 2023 - Municipal Stormwater Permitting Approach for the Mid-Atlantic Region (pdf) (131.69 KB, November 7, 2023)

• July 19, 2023 - EPA Expectations for the Implementation of the Conowingo WIP Phased Approach (pdf) (189 KB, September 27, 2023)

• Cover Letter and Final Evaluation of the Conowingo Final Water Implementation Plan (pdf) (380.06 KB, January 25, 2022)

• PA Phase 3 WIP Amendment Expectations 12/22/21 (pdf) (196.72 KB, December 22, 2021) December 22, 2021 – Letter from EPA Regional Administrator Adam Ortiz to Pennsylvania Department of Environmental Protection Secretary Patrick McDonnell regarding expectations for the 2021 Pennsylvania Phase III WIP amendment. 

• September 10, 2019 – Letter from EPA Regional Administrator Cosmo Servidio to Pennsylvania Department of Environmental Protection Secretary Patrick McDonnell regarding reallocation of certain EPA Chesapeake Bay grant funding. (pdf) (188.53 KB)
• August 16, 2018 - EPA's Expectations for Federal Lands and Facilities in Supporting the Chesapeake Bay Watershed Jurisdictions' Phase III Watershed Implementation Plans (pdf) (78.12 KB)
• June 26, 2018 - EPA Letter to Chesapeake Bay Foundation regarding NPDES regulation revisions for Concentrated Animal Feeding Operations (CAFOs) (pdf) (370.46 KB)
• June 20, 2018 - EPA’s Expectations for the Phase III Watershed Implementation Plans (pdf) (310.7 KB)
• April 27, 2017 – EPA’s State-specific Phase III WIP Expectations for Pennsylvania (pdf) (483.35 KB)
• January 19, 2017 - EPA's Interim Expectations for the Phase III Watershed Implementation Plans (pdf) (549.68 KB)
• July 6, 2011 Guide for Chesapeake Bay Water Quality Two-year Milestones (pdf) (476.93 KB)
• April 29, 2011 EPA Guide for Federal Lands and Facilities' Role in Chesapeake Bay Jurisdictions Phase II Watershed Implementation Plans (pdf) (250 KB)
• March 11, 2011 EPA Guide for Chesapeake Bay Jurisdictions for the Development of Phase II Watershed Implementation Plans (pdf) (48.53 KB)
• August 13, 2010 - EPA Letter to State Secretaries Outlining the Bay TMDL Draft Sediment Allocations (pdf) (913.48 KB)
• July 1, 2010 - EPA Letter to State Secretaries Outlining the Bay TMDL Draft Nitrogen and Phosphorus Allocations (pdf) (4.99 MB)
• June 11, 2010 - EPA Letter to PSC Outlining the Schedule for TMDL Implementation (pdf) (2.29 MB)
• April 2, 2010 - EPA Guide for the States Regarding EPA's Evaluation of Phase I WIPs (pdf) (281.14 KB)
• December 29, 2009 - EPA Letter to PSC on the Chesapeake Bay Accountability Framework and Federal Actions (pdf) (2.63 MB)
• November 4, 2009 EPA Letter to PSC Outlining EPA's Expectations for Watershed Implementation Plans (WIPs) (pdf) (26.59 MB)
• November 3, 2009 - EPA Letter to PSC on Preliminary Basinwide Targets for Nitrogen and Phosphorus (pdf) (911.98 KB)
• September 11, 2008 - EPA Letter to PSC on Chesapeake Bay TMDL Development (pdf) (5.01 MB)