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Selected drinking and irrigation water standards (mg l− 1)a
| Constituent | Drinking water | For fine-textured soils | For any soil | For livestock |
|---|---|---|---|---|
| Aluminum | 20 | 5 | ||
| Arsenic | 0.01 | 2 | 0.1 | 0.2 |
| Barium | 1.0 | |||
| Boron | 0.75 | 2 | 5.0 | |
| Cadmium | 0.01 | 0.05 | 0.01 | 0.05 |
| Chromium | 0.05 | 1.0 | 0.1 | 1.0 |
| Copper | 1.0 | 5 | 0.2 | 0.5 |
| Iron | 0.3 | 20 | 5 | |
| Lead | 0.05 | 10 | 5 | 0.1 |
| Manganese | 0.05 | 10 | 0.02 | |
| Mercury | 0.002 | 0.01 | ||
| Nickel | 2.0 | 0.2 | ||
| Selenium | 0.01 | 0.02 | 0.02 | 0.05 |
| Zinc | 5 | 10 | 2 | 25 |
