Welcome to BayTAS v.2.0. BayTAS provides access to Phase 5.3.2 Watershed Model nutrient load, BMP, and supporting data specific to implementation of and progress toward the Chesapeake Bay TMDL.

Login or register here for access to publicly available Phase 5.3.2 model data (2009-2017) used for tracking progress toward the TMDL.

The 2018-2019 Milestones and the Phase III WIPs are to be developed using CAST.chesapeakebay.net, the Phase 6 model. Phase 6 data and reports are available on the Public Reports Page.

Beginning with 2018 Progress, all data will be Phase 6 (Phase 6 Fact Sheet)