Perfluorooctanesulfonic acid
EPA MCLG Level
0 ppb
Maximum level that poses minimal health risk based on the latest science
Health Effects
Common Sources
How to Remove It
Water filters certified under the following NSF standards are effective at removing Perfluorooctanesulfonic acid:
Where is Perfluorooctanesulfonic acid Found?
Perfluorooctanesulfonic acid has been detected above EPA health guidelines in 563 cities serving 124.3M people across the US.
and 558 more cities
EPA MCLG Level
The EPA MCLG represents the maximum level that poses minimal health risk based on the latest scientific research. It's often more protective than federal legal limits.
Contaminant Type
Perfluorooctanesulfonic acid is classified as a PFAS contaminant.
Related PFAS Contaminants
Check Your Water
Find out if Perfluorooctanesulfonic acid is in your tap water.
Search cities for Perfluorooctanesulfonic acid dataTest Your Water for This Contaminant
Public water reports may not test frequently enough or at your specific tap. Professional home testing provides current, location-specific results.
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Standard Home Water Test
$232
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Advanced Home Water Test
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Most comprehensive home water test including all standard tests plus additional parameters for ultimate peace of mind.
Tap Score
PFAS Forever Chemicals Test
$239
Specialized test for PFOA, PFOS, and 24 other forever chemicals. Essential for areas near military bases, airports, or industrial sites.
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