EPA legal limit
No federal limit
Maximum Contaminant Level
EWG health guideline
No guideline
Science-based, stricter target
Health effects
At low concentrations found in drinking water, anionic surfactants are not considered a significant direct health hazard. They can cause taste and odour issues, foam formation, and may affect the bioavailability of other contaminants. Emerging research is examining endocrine disruption potential at low levels.
Where it comes from
Wastewater treatment plant discharge (surfactants are not fully removed by conventional treatment), industrial discharge, agricultural runoff containing detergent-based pesticide formulations.
How it's regulated
No federal MCL. Some European countries regulate linear alkylbenzene sulfonates (LAS) — the most common anionic surfactant — in drinking water. Unregulated in the U.S.
How to filter anionic surfactants
Not all filters address anionic surfactants. Look for independently certified filters—NSF International certification means the removal claim has been independently verified.
Frequently asked questions
What is anionic surfactants?
A class of synthetic detergents and cleaning agents that carry a negative charge. Found in household cleaners, laundry detergents, and industrial processes. Enter water supplies through wastewater discharge and agricultural runoff.
What are the health effects of anionic surfactants?
At low concentrations found in drinking water, anionic surfactants are not considered a significant direct health hazard. They can cause taste and odour issues, foam formation, and may affect the bioavailability of other contaminants. Emerging research is examining endocrine disruption potential at low levels.
Is anionic surfactants regulated in drinking water?
No federal MCL. Some European countries regulate linear alkylbenzene sulfonates (LAS) — the most common anionic surfactant — in drinking water. Unregulated in the U.S.
Where does anionic surfactants come from?
Wastewater treatment plant discharge (surfactants are not fully removed by conventional treatment), industrial discharge, agricultural runoff containing detergent-based pesticide formulations.
How do I remove anionic surfactants from tap water?
The most effective methods for removing anionic surfactants are: Activated carbon block filter, Reverse osmosis (RO). Look for NSF-certified systems—independent certification confirms removal claims have been verified.
Is anionic surfactants in your water?
Enter your ZIP code to see the measured level in your specific utility.