| Variable | Factor 1 | Factor 2 | Communality |
| Fish log10THg | 0.64 | 0.47 | 0.63 |
| Lake log10THg | 0.97 | 0.09 | 0.95 |
| Precipitation | 0.95 | 0.11 | 0.92 |
| atmHgdep | 0.84 | 0.00 | 0.70 |
| Tjan | 0.81 | −0.32 | 0.76 |
| TJuly | 0.38 | −0.86 | 0.88 |
| Latitude | −0.92 | 0.25 | 0.91 |
| Longitude | 0.80 | 0.40 | 0.80 |