| Location | Atmosphere | Fertilizer | Manure | Point Source |
|---|---|---|---|---|
| San Joaquin River, CA | 3% | 50% | 46% | 1% |
| Snake River, ID | 3% | 70% | 26% | 1% |
| Willamette River, OR | 3% | 70% | 26% | 1% |
| Palouse River, WA | 3% | 90% | 6% | 1% |
| Placate River, NE | 2% | 60% | 38% | 0 |
| Red River of the North, NM, ND | 1% | 80% | 18% | 0 |
| White River, IN | 5% | 70% | 23% | 2% |
| Susguehanna River, PA | 15% | 18% | 60% | 2% |
| Connecticut River, CT | 76% | 10% | 10% | 4% |
| Potomac River, DC | 30% | 28% | 40% | 2% |
| Tar River, NC | 19% | 60% | 20% | 1% |
| Altannaha River, GA | 4% | 25% | 70% | 1% |
| Apalachicola River, FL | 9% | 40% | 50% | 1% |
| White River, AR | 9% | 20% | 70% | 1% |
| Trinity River, TX | 2% | 67% | 30% | 1% |
| South Platte River, CO | 50% | 38% | 6% | 6% |
Note: all figures are estimates based on the small graphs accompaning the map.