Inorganic
Selenium in your water
Health effects
Selenium is a naturally occurring element that is a necessary nutrient at trace levels but toxic in excess. Long-term high exposure can damage the nervous system, hair, and nails. It enters water from natural deposits and from irrigation drainage.
The guideline vs. the legal limit
The federal legal limit is the maximum allowed by law. The EWG health guideline is what independent scientists consider safe — it is often far stricter.
Health guideline (EWG)
No health guideline set
Federal legal limit (MCL)
50 ppb
Source: EWG Tap Water Database & EPA MCLs · 2026
What removes Selenium
We're still cataloging certified systems for Selenium. A free water test is the fastest way to get a matched recommendation.
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Is Selenium in your water?
Check your city's public record, then book a free 30-minute test to confirm what's in your home.