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Water Quality Standards: Lead
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 | WHO guideline mg per L (mg/L) | contaminant category | health effects | standard | treatment methods |
|---|---|---|---|---|---|---|---|---|
| Lead | 7439-92-1 | 0 | Action Level = 0.015 mg/L | 0.01 | inorganic | Developmental delays; attention/learning deficits in children; kidney problems; hypertension in adults | EPA NPDWR 40 CFR 141; WHO GDWQ 4th Ed. | Corrosion control; pH adjustment; pipe replacement |
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