Part II Zinc concentrations (mg/1 Zn) for different water hardness value between 10 and 500 mg/l CaCO3I1
Northern Ireland Not yet in force
| Water hardness (mg/1 CaCO3) | ||||
|---|---|---|---|---|
| 10 | 50 | 100 | 500 | |
| Salmonid waters (mg/1 Zn) | 0.03 | 0.2 | 0.3 | 0.5 |
| Cyprinid waters (mg/1 Zn) | 0.3 | 0.7 | 1.0 | 2.0 |
Annotations
Commencement
- I1
Sch. 1 Pt. II in operation at 5.1.1998, see reg. 1