Ambient Water Quality Criteria for Dissolved 
Oxygen, Water Clarity and Chlorophyll a for the 
Chesapeake Bay and Its Tidal Tributaries: 2010 
Technical Support for Criteria Assessment 
Protocols Addendum 
May 2010 
U.S. Environmental Protection Agency 
Region III 
Chesapeake Bay Program Office 
Annapolis, Maryland 
and 
Region III 
Water Protection Division 
Philadelphia, Pennsylvania 
in coordination with 
Office of Water 
Office of Science and Technology 
Washington, D.C. 
and 
The states of 
Delaware, Maryland, New York 
Pennsylvania, Virginia and 
West Virginia and the District of Columbia 
Library of Congress 
2012 
545093 
