We are improving our website to help you find what you're looking for. During this transition some URLs may change. Learn more...

Chesapeake Bay Total Maximum Daily Load (TMDL)

   Cleaner Air, Cleaner Bay

A new story map illustrates how Clean Air Act implementation by EPA and state partners has benefitted the Chesapeake Bay. 

View the story map. Exit 

Chesapeake Bay Total Maximum Daily Load (TMDL)

What is the Bay TMDL?What is the Bay TMDL?

On December 29, 2010, the U.S. Environmental Protection Agency established the Chesapeake Bay Total Maximum Daily Load (TMDL). The TMDL is a historic and comprehensive "pollution diet" to restore clean water in the Chesapeake Bay and the region's streams, creeks, and rivers.

Brook Trout in Pendleton County WV

Implementing the TMDL

A number of elements are in place to ensure that all pollution control measures needed to fully restore the Bay and its tidal rivers are in place by 2025. Practices will also be in place by 2017 to meet 60 percent of the necessary pollution reductions.

Basket of Chesapeake Bay Oysters

Progress in the Watershed

Actions are being taken across six states and the District of Columbia to reduce nitrogen, phosphorus and sediment loads to meet the clean water goals of the Bay TMDL.