Welcome to BayFAST
User Name:
We are sorry, but this site requires you to enable cookies to login.
We have detected that cookies are disabled in your browser.

BayFAST will no longer be available as of June 1, 2018, pending final approval of the Bay TMDL 2017 milestone assessment and progress review. The current version of BayFAST is based on the Watershed Model Phase 5.3.2 and is not based on current science or the latest data. Please download any scenario data that you would like to keep prior to June 2018.CAST.chesapeakebay.net is the Phase 6 model and accommodates many of the functions of BayFAST.

FAQs about the transition to Phase 6

The Chesapeake Bay Facility Assessment Scenario Tool (BayFAST) allows users to rapidly develop scenarios with varying best management practices. BayFAST allows users to define their parcel boundaries and land uses.

Output includes nitrogen, phosphorus, and sediment loads from all sectors and sources, acres of each BMP, and costs for the scenario for any area in the Chesapeake Bay Watershed. These loads are consistent with the Chesapeake Bay Program’s Watershed Model. BayFAST also provides inputs to the Chesapeake Bay Program computer models.

Users can compare among scenarios to select the practices that reduce the most pollution, are most cost-effective, and target these practices to the highest impact areas. Scenarios can be used for TMDL Watershed Implementation Plans, Milestones, or for local planning purposes.