PFAS
PFOA in your water
Is PFOA in drinking water dangerous?
It depends on the level and how long you're exposed. The EPA legal limit (MCL) for PFOA is 4 ppt, but health-based goals (EPA MCLG / WHO) are often stricter, at 0.004 ppt. Meeting the legal limit isn't the same as zero risk — test your water to know your level.
How do you remove PFOA from water?
PFOA is treated by Reverse Osmosis and Whole-House Carbon Filter. Choose a system independently certified to NSF/ANSI standards to reduce PFOA, and test your water first to confirm the level.
Source: EPA MCL / MCLG; WHO guidelines; NSF/ANSI · 2026
Health effects
PFOA is a long-lived "forever chemical" once used to make nonstick and stain-resistant products. It builds up in the body over time and is associated with certain cancers, immune effects, and developmental harm. EPA finalized a strict drinking-water limit for it in 2024.
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)
0.004 ppt
Federal legal limit (MCL)
4 ppt
Source: EPA MCL / MCLG; WHO guidelines · 2026
Not affiliated with or endorsed by EWG.
What removes PFOA
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 PFOA in your water?
Check your city's public record, then book a free 30-minute test to confirm what's in your home.