Back 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.
