Inorganic
Fluoride in your water
Is Fluoride in drinking water dangerous?
It depends on the level and how long you're exposed. The EPA legal limit (MCL) for Fluoride is 4000 ppb. Meeting the legal limit isn't the same as zero risk — test your water to know your level.
How do you remove Fluoride from water?
Fluoride is treated by Reverse Osmosis. Choose a system independently certified to NSF/ANSI standards to reduce Fluoride, and test your water first to confirm the level.
Source: EPA MCL / MCLG; WHO guidelines; NSF/ANSI · 2026
Health effects
Fluoride occurs naturally in groundwater and is also added by many utilities to reduce tooth decay. At high natural levels it can damage developing teeth and, over long exposure, weaken bones. The federal limit targets these high-level health effects rather than the low levels used for dental benefit.
The health-based goal vs. the legal limit
The federal legal limit (MCL) is the maximum allowed by law. The health-based goal (EPA MCLG / WHO) is a health target — it is often stricter than the legal limit, and it is not itself a legal limit.
Health-based goal (EPA MCLG / WHO)
No health-based goal set
Federal legal limit (MCL)
4000 ppb
Source: EPA MCL / MCLG; WHO guidelines · 2026
Not affiliated with or endorsed by EWG.
What removes Fluoride
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Is Fluoride in your water?
Check your city's public record, then book a free 30-minute test to confirm what's in your home.