IV-390 



These tables show industrial water use for the coastal states, not 

 for the coastal counties only, but nearly all wastes discharged into 

 the waters of these states ultimately reach estuarine waters. Only 

 4000 of the more than 200,000 manufacturing plants in the coastal 

 states account for 97 percent of the total liquid wastes discharged. 

 Ut the nearly 22 billion gallons of industrial wastes discharged 

 daily, only 29 percent receive any waste treatment. The Pacific 

 Southwest biophysical region has the greatest percentage of 

 industrial wastes treated, while the North Atlantic biophysical 

 region has the least. 



Of the major water use industries shown in Table IV. 5. 8 the petrol- 

 eum and coal products industries have the highest percentage of 

 wastes treated and the chemical industries have the least. These 

 five industrial groupings are responsible for 76 percent of the 

 total volume of industrial wastes discharged in the coastal states. 



The primary metals and petroleum and coal products industries are 

 centralized in the Middle Atlantic, Gulf, Pacific Southwest, and 

 Pacific Northwest regions, but the other major water use industries 

 are distributed throughout all regions. The kinds of wastes 

 associated with food, paper, and chemical manufactures are there- 

 fore universal problems, while the other major industrial waste 

 types concern only particular estuarine environments. 



