Basic Information about Fluoride in Drinking Water | Basic Information about Regulated Drinking Wate

Fluoride at a Glance Maximum Contaminant Level (MCL) = 4 milligrams per Liter (mg/L) or 4 parts per million (ppm) Maximum Contaminant Level Goal (MCLG) = 4 mg/L or 4 ppm Health Effects Some people who drink water containing fluoride in excess of the MCL .

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