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Monthly Mean Dissolved Oxygen Concentration 
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Monthly Mean Dissolved Oxygen Concentration 
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Figure V-3. Plots of monthly mean ambient dissolved oxygen concentration versus the one percentile dissolved 
oxygen concentrations in several example Chesapeake Bay Program segments: the northern Chesapeake Bay 
(CB1TF), Bohemia River (BOHOH), open-water and deep-water lower eastern Chesapeake Bay (CB7PH), Magothy 
River (MAGMH) and the lower York River (YRKPH). These graphics show patterns of dissolved oxygen data from the 
Chesapeake Bay Water Quality Monitoring Program from May-September 1985-2003. Circles are observed dissolved 
oxygen concentration data; open triangles are dissolved oxygen concentrations predicted by the regression model: 
1 percent dissolved oxygen concentration as a function of monthly mean dissolved oxygen concentration and 
coefficient of variation. 
Source: Chesapeake Bay Water Quality Monitoring Program database. 
http://www.chesapeakebay.net/data 
chapter v 
Guidance for Attainment Assessment of Instantaneous Minimum and 7-Day Mean Dissolved Oxygen Criteria 
