Table 1

Estimates of Annual Loadings for Selected Pollutants to Long Island Sound from Seven Major Sources
(from Farrow et al. 1986)

   Pollutant Percent of Total Loading from Major Sources a
A B C D E F G
 Total Nitrogen
37.6 2.1 <0.1 7.3 3.7 0.1 49.2
 Total Phosphorus 66.2 0.1 0.1 7.9 0.5 <0.1 25.2
 Heavy Metals              
 As 51.7 <0.1 1.7 8.1 3.4 <0.1 35.1
 Cd 28.2 <0.1 <0.1 5.1 <0.1 <0.1 66.7
 Cr 18.9 4.2 0.4 7.1 8.0 0.4 61.0
 Cu 31.9 3.4 5.2 7.2 1.2 0.2 50.9
 Fe 4.9 <0.1 <0.1 15.7 34.8 2.2 42.4
 Hg 25.4 0.6 0.1 7.3 <0.1 <0.1 66.6
 Pb 14.7
2.3 <0.1 43.0 <0.1 <0.1 40.0
 Zn 22.6 2.9 1.6 12.8 1.9 0.1 58.2
 Oil & Grease 66.6 0.4 0.3 32.7 - - -
 Chlorinated
 Hydrocarbons
90.3 1.3 - 5.4 3.0 - -
 Fecal Coliforms 1.0 <0.1 - 47.3 - - 51.7
 Sludge 100 - - - - - -

a   A= wasterwater treatment plants
B= industrial discharges
C= power plants
D= urban runoff
E= Cropland runoff
F= forestland runoff
G= upstream sources

(-) indicates no estimates made for this pollutant in the catergory.


Get to the point table 2


footer art