A-17 
Susquehanna R 
Baltimoie wm 
Pa taps co R. WT *' 
Waalxinaton 
S D.C. 
Potomac R 
«rrzt .Nt V > 
*ETZ3 irrJU; 
Tnit 'tw-p 
miB Cry 
TT12A. < 
Rappahannock R 
/'wfcomi co R 
LE11 i 
LE12^5 
LE13 ' 
i LE3 4 
Richmond Yoik R. 
TT 4.2 
TTV 2 O. 
Figure 2.3. Map of the tidal water quality monitoring stations. 
appendix a 
The Cumulative Frequency Diagram Method for 
Determining Water Quality Attainment 
