vi-no 



expected norms can be Interchanged amonq estuaries, much work 

 with each individual system is needed to establish the validity 

 of such interchanges. 



Effects of Combined Wastes 



Residential, recreational, agricultural, and industrial develop- 

 ment of the estuarine zones is proceeding at a ranid rate. These 

 activities frequently result in highly complex waste waters from 

 many sources that eventually become mixed in the bays and oceans. 

 While the toxic and other characteristics of some of the indivi- 

 dual types of waste water have been studied, effects of combined 

 waste waters, including synergistic and antagonistic effects* are 

 largely unknown. 



Water Quality Requirements For 

 Fish, Other Aquatic Life and Wildlife 



Having learned something of the water quality of the estuaries, 

 the next step is to ascertain the water quality requirements for 

 the estuarine and near-shore environment. At the present time, 

 knowledge in this area is incomplete, with the resulting tendency 

 to use criteria that have been developed for freshwater systems. 

 Because of the complexity of the marine system, many of the 

 measures used in the freshwater environments are of questionable 

 value or at least difficult to interpret. Although there has 



