| Metal | MOE criterion | Thomas-Mudroch criterion | EPA criterion for severe contamination |
| Cadmium | 1 | 1.5 | 6 |
| Copper | 25 | 45 | 50 |
| Iron | 10,000 | 45,500 | 25,000 |
| Manganese | - | 1 625 | 500 |
| Lead | 50 | 50 | 60 |
| Zinc | 100 | 105 | 200 |