- 2 - 



L because neither the sewer systems nor the sewage treatment facilities 

 are of large enough capacity to handle all the combined sewage and 

 storm water entering the sewers. To separate storm water from the 

 sanitary sewers in these cities would be an undertaking of exceedingly 

 high cost. 



Because of the very limited dilution available for wastes emptied 

 into the waters of the Upper Bay or tributaries, the highest feasible 

 degree of sewage treatment is required. These waters receive the sewage 

 and wastes from the densely populated and highly industrialized 

 communities of the state, the industrial wastes here discharged are 

 difficult to purify and the results of conventional purification 

 processes are not as good as would be desired. This places a greater 

 demand for water for dilution. 



The water that is available for dilution in the Upper Bay area, 

 is made up almost wholly of water carried into the area by the tides. 

 For example in the area north of Fields Point where most of the sewage 

 of the state must be discharged, river discharge during the dry summer 

 months contributes only about four percent of the total dilution water. 

 If we consider the dilution available north of Conimicut and Nayat 

 Points the dilution afforded by river discharge is only an in- 

 significant fraction of the total dilution water available. 



The dilution water available in the Upper Bay is now meager and 

 the problem of sewage disposal is a most difficult one; if the presently 

 available water for dilution and dispersion is reduced by, roughly,- 

 one third, the pollution problem will be made a far more serious one 

 than it is now. 



The time provided for an evaluation of this latest proposal which 



I differs from earlier ones in that it restricts tidal flow substantially 



G-22 



