PFAS
PFAS (combined) in your water
Is PFAS (combined) in drinking water dangerous?
It depends on the level and how long you're exposed. The EPA has set no federal legal limit for PFAS (combined), but health-based goals (EPA MCLG / WHO) are often stricter, at 1 ppt. Meeting the legal limit isn't the same as zero risk — test your water to know your level.
How do you remove PFAS (combined) from water?
PFAS (combined) is treated by Reverse Osmosis and Whole-House Carbon Filter. Choose a system independently certified to NSF/ANSI standards to reduce PFAS (combined), and test your water first to confirm the level.
Source: EPA MCL / MCLG; WHO guidelines; NSF/ANSI · 2026
Health effects
PFAS are a large family of synthetic "forever chemicals" that resist breaking down and accumulate in people and the environment. As a group they are associated with cancer, immune suppression, hormone disruption, and developmental harm. Several individual PFAS now carry federal drinking-water limits.
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)
1 ppt
Federal legal limit (MCL)
No federal limit set
Source: EPA MCL / MCLG; WHO guidelines · 2026
Not affiliated with or endorsed by EWG.
What removes PFAS (combined)
Semipermeable membrane filtration
Reverse Osmosis
Pushes water through a fine membrane that removes the dissolved solids most filters miss.
Look for: NSF/ANSI 58 certification
How it works→Activated carbon adsorption
Whole-House Carbon Filter
A point-of-entry carbon bed that strips chlorine, chloramine, and chemical taste from every tap.
Look for: NSF/ANSI 42 certification
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Is PFAS (combined) in your water?
Check your city's public record, then book a free 30-minute test to confirm what's in your home.