Chesapeake Assessment Scenario Tool

Another Year of Progress Toward Restoring the Chesapeake Bay

2024 Progress Scenario Now Available

The official 2024 Progress scenario is now available on CAST. This scenario reflects best management practices (BMPs) that were implemented and functioning during the reporting year July 1, 2023 - June 30, 2024, as reported by jurisdictions to the Chesapeake Bay Program, and verified by the Environmental Protection Agency (EPA).

The 2024 Progress Scenario can be used to assess progress toward the EPA's Total Maximum Daily Load (TMDL) planning targets. Use the Compare Planning Targets tool to track progress toward the Bay water quality goals. These targets are set at the state-basin scale and do not break down by sector, providing flexibility to jurisdictions in developing implementation strategies.

To explore the data in more depth, run a Public Report, such as:

• BMP Submitted vs. Credited Report to see the BMPs that were submitted and recieved credit in the selected scenario.
• Loads Report to view nitrogen, phosphorus, and sediment loads by geographic scale, source sector, or scenario comparison.

No login is required to use these tools, making them easy to access and share.

Additionally, several CAST resorces have been updated with the 2024 Progress data:

• The Trends Over Time section now includes updated graphs and maps that track jurisdictional and Bay-wide progress over multiple years.
• The BMP Targeting Maps have also been refreshed, helping jurisdictions and partners identify high-priority areas for future implementation.
• The TMDL Tracking Reports section offers downloadable reports for each of the seven major jurisdictions, detailing the success and errors of the submitted BMP records.

With the release of the 2024 Progress Scenario and these updated tools, jurisdictions have more current and comprehensive information to support planning, evaluate BMP effectiveness, and chart the path toward a healthier Chesapeake Bay.