Science & Technology

Chesapeake Bay TMDL Midpoint Assessment

This page describes what the midpoint assessment is, its role in the Chesapeake Bay TMDL, and how it will assist in restoring the Chesapeake Bay.

Memorandum from Secretary Tayloe Murphy

This page provides the memorandum sent by Secretary Tayloe Murphy to the Chesapeake Bay Program Principals' Staff Committee (PSC) that summarized the comprehensive set of agreements made by Bay watershed partners.

Chesapeake Bay TMDL Document

This page provides the Total Maximum Daily Load (TMDL) report for the Chesapeake Bay. It includes the executive summary, main report, and appendices. The Chesapeake Bay TMDL was established by U.S. EPA Region 3 on December 29, 2010

EPA Interim Evaluation of 2014-2015 Milestone Progress in the Chesapeake Bay Watershed

This page provides the EPA interim evaluations of the 2014-2015 milestones for the Chesapeake Bay TMDL. These interim assessments provide a mid-point check on the progress made on the 2014-2015 milestones, recognizing the achievements made in 2014.

Chesapeake Bay TMDL Appendices

This page links to the appendices of the Chesapeake Bay TMDL document

EPA Interim Evaluation of 2012-2013 Milestone Progress in the Chesapeake Bay Watershed

This page provides the EPA interim evaluations of the 2012-2013 milestones for the Chesapeake Bay TMDL. These interim assessments provide a mid-point check on the progress made on the 2012-2013 milestones, recognizing the achievements made in 2012.

Sector Growth Demonstration in the Chesapeake Bay Watershed

EPA continues to work with the Bay states and DC to adress areas of concern identified in the final reports. EPA has asked each state and DC to prepare a Sector Load Growth Demonstration using the Sector Load Growth techical memorandum as a guide.

Chesapeake Bay Agreements

Since 1983, the Chesapeake Bay Program (CBP) partnership has used written agreements to guide the restoration of the Chesapeake Bay and its watershed. This page provides links to those agreements.

Comments on EPA Evaluations of Trading and Offset Programs in the Chesapeake Bay Watershed from Interested Stakeholders

This page provides all of the comments made by EPA partners and stakeholders on the EPA assessments of Trading and Offset Programs in the Bay states and District of Columbia.

EPA Evaluations of Phase I Watershed Implementation Plans in the Chesapeake Bay Watershed

This page provides the PDF documents of EPA's evaluation of the Phase I WIPs submitted by the jurisdictions (Delaware, District of Columbia, Maryland, New York, Pennsylvania, Virginia and West Virginia).

EPA Evaluation of Final 2012-2013 Milestone Commitments and Phase II WIPs in the Chesapeake Bay Watershed

This page provides the final evaluation of the 2012-2013 milestone commitments and the evaluation of the Phase II Watershed Implementation Plans for the Chesapeake Bay TMDL.

Final EPA Evaluation of 2012-2013 Milestone Progress and 2014-2015 Milestone Commitments in the Chesapeake Bay Watershed

This page provides PDFs of the final EPA evaluation of 2012-2013 milestone progress and 2014-2015 milestone commitments.

Opportunities for CMAQ Collaborators

Opportunities for students and postdoctoral fellows to work with the CMAQ team are available.

Advancing Environmental Safety: Celebrating 20 years of Nanotechnology Research at EPA

EPA develops science and processes to evaluate the human health and ecological safety of products containing nanomaterials to estimate their potential environmental impact.

EPA announces $48 million for southeastern states to repair water systems impacted by Hurricane Helene

Release Date: September 30, 2025