Inorganic
Mercury in your water
Is Mercury in drinking water dangerous?
It depends on the level and how long you're exposed. The EPA legal limit (MCL) for Mercury is 2 ppb. Meeting the legal limit isn't the same as zero risk — test your water to know your level.
How do you remove Mercury from water?
Mercury is treated by Reverse Osmosis. Choose a system independently certified to NSF/ANSI standards to reduce Mercury, and test your water first to confirm the level.
Source: EPA MCL / MCLG; WHO guidelines; NSF/ANSI · 2026
Health effects
Mercury reaches water from natural deposits, industrial runoff, and discarded products. Long-term exposure harms the kidneys and nervous system. It is tightly regulated because of its toxicity at low concentrations.
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)
2 ppb
Source: EPA MCL / MCLG; WHO guidelines · 2026
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What removes Mercury
- 1
See your Water Score
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- 2
Get your custom fix-it plan
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- 3
Book your free 30-min test
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Is Mercury in your water?
Check your city's public record, then book a free 30-minute test to confirm what's in your home.