| Soil type/location | Description/source | mg/kg | Reference |
| NY CAP Site | Upwind CAP (South and West) Composite Samples | 0.003 | [2] [30] [31] |
| Niagara Falls | Surface Soils―Niagara Falls Board of Health―Clean-up Target―Site Remediation | 0.50 | [2] |
| NY State | Surface Soils (Control) | 0.12 | [9] |
| US | Typical Soils―NJDEP 1993; US EPA Report | 0.008 - 0.117 | [9] |
| East St, Louis, MO | Surface Soils (63 Sample Set) | 0.17 | [29] |
| Europe | Surface Soils―Upwind CAP | 0.150 | [7] |
| Europe | Surface Soils―Upwind CAP | 0.075 | [7] |