Specimen No. 0099
CautionMineralhousehold chemical
Fluoride in Tap Water
fluoride · fluoride water · water fluoridation
Added to municipal water at 0.7 mg/L in the US to prevent tooth decay. Benefits for dental health are established; however, a 2024 federal court ruling found the EPA must reassess neurodevelopmental risks from current exposure levels.
high confidence
Researched April 18, 2026Specimen 0099Fluoride in Tap Water
Concerns
- Dental fluorosis (mottling) at higher exposure levels in children
- 2024 US federal court ruling: EPA must act on evidence linking fluoride to lower IQ in children at exposures relevant to water fluoridation [peer review ongoing]
- Skeletal fluorosis at very high levels (rare in US)
- Debate continues — WHO supports fluoridation; some researchers call for review
Regulatory flags
- ⚑NTP (2024): classified as presumed neurodevelopmental hazard at high doses
- ⚑WHO recommended limit: 1.5 mg/L
- ⚑EPA maximum contaminant level: 4 mg/L
Commonly found in
Tap waterToothpasteSome mouthwashesDental treatments
Sources & references
Last researched: April 18, 2026
Research disclaimer: This rating is based on available peer-reviewed research and regulatory assessments at the time of publication. It is not medical advice. Consult a qualified professional for personal health or skin concerns.
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