IV-381 

 SECTION 2. SOURCES OF POLLUTION 



Nearly all of man's activities can result in environmental degrada- 

 tion. The pollutants and polluting conditions outlined in the pre- 

 ceding section are rarely unique to a particular use or specific 

 activity, but they result from man's existence in the estuarine 

 zone as well as his use of it. The major sources of pollution 

 described in this section fall into three broad categories: 



(1) Those sources associated with the extent of 

 development of the estuarine zone, including waste 

 discharges from municipalities and industries, and 

 land runoff from urban and agricultural land. 



(2) Those sources associated with particular activities 

 of great pollutional significance, specifically dredg- 

 ing and filling, watercraft operation, underwater 

 mining, and heated effluent discharges. 



(3) External sources having impact derived through flow 

 regulation and upstream water quality. 



MUNICIPAL WASTES 



Over eight billion gallons of municipal wastes are discharged daily 

 into the waters of the estuarine zone. While most of this volume 

 is domestic sewage, many municipal waste discharges also contain 



