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Water Quality Standards: Total Trihalomethanes (TTHMs)
EPA and WHO drinking water quality standards — MCLs, MCLGs, WHO guideline values, secondary standards, health effects, and treatment methods for regulated contaminants
| contaminant | EPA MCL mg per L (mg/L) | WHO guideline mg per L (mg/L) | contaminant category | health effects | standard | treatment methods |
|---|---|---|---|---|---|---|
| Total Trihalomethanes (TTHMs) | 0.08 | 0.1 | DBP | Liver/kidney/nervous system problems; cancer risk | EPA NPDWR 40 CFR 141; WHO GDWQ 4th Ed. | Control of organic precursors; granular activated carbon |
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