Table 9.
Manganese thresholds [46].
| Compartment | Agency | Description | Limits |
|---|---|---|---|
| Air | WHO | Air Quality Guidelines | 0.15 μg/m3 |
| Workplace Air | OSHA | Legal limit over an 8-hour workday of manganese in air | 5 mg/m3 |
| Drinking-Water | WHO | Drinking-Water Quality Guidelines | 0.4 mg/L |
| EPA | 1–10 day exposure of Mn at this concentration does not expect to produce any adverse effects in a youngster | 1 mg/L | |
| EPA | Lifetime exposure of Mn at this concentration is not expected to produce any adverse effects in humans | 0.3 mg/L | |
| Bottled Water | FDA | Legal limit not to be exceeded | 5 mg/m3 |