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Water Quality Standards: Cyanide (free)
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 mg per L (mg/L) | contaminant category | health effects | standard | treatment methods |
|---|---|---|---|---|---|---|---|
| Cyanide (free) | 57-12-5 | 0.2 | 0.2 | inorganic | Nerve damage; thyroid problems | EPA NPDWR 40 CFR 141 | Ion exchange; reverse osmosis; chlorination |
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