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Water Quality Standards: Total Coliforms
EPA and WHO drinking water quality standards — MCLs, MCLGs, WHO guideline values, secondary standards, health effects, and treatment methods for regulated contaminants
| contaminant | EPA MCLG mg per L (mg/L) | EPA MCL note | contaminant category | health effects | standard | treatment methods |
|---|---|---|---|---|---|---|
| Total Coliforms | 0 | No more than 5% of monthly samples | microbiological | Indicator of potential harmful bacteria; gastrointestinal illness | EPA NPDWR 40 CFR 141 | Disinfection; system integrity maintenance |
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