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Water Quality Standards: Copper
EPA and WHO drinking water quality standards — MCLs, MCLGs, WHO guideline values, secondary standards, health effects, and treatment methods for regulated contaminants
| contaminant | CAS number | EPA MCLG mg per L (mg/L) | EPA MCL note | EPA secondary standard mg per L (mg/L) | WHO guideline mg per L (mg/L) | contaminant category | health effects | standard | treatment methods |
|---|---|---|---|---|---|---|---|---|---|
| Copper | 7440-50-8 | 1.3 | Action Level = 1.3 mg/L | 1 | 2 | inorganic | Gastrointestinal distress (short-term); liver/kidney damage (long-term) | EPA NPDWR 40 CFR 141; WHO GDWQ 4th Ed. | Corrosion control; pH adjustment; orthophosphate treatment |
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