Quick Answer: Reverse osmosis, or RO, gets rid of 90-99% of PFAS (per- and polyfluoroalkyl substances) from your drinking water. It’s one of the best ways to treat water out there. The EPA’s April 2024 PFAS regulation set strict limits, called maximum contaminant levels (MCLs), of 4 parts per trillion (ppt) for PFOA and PFOS. These are the two most-studied “forever chemicals.” A properly set up RO system easily meets these new standards.
PFAS contamination has become a huge deal for drinking water safety this decade. People call them “forever chemicals” because they just don’t break down naturally in the environment. The says PFAS compounds are in the drinking water of over 110 million Americans. In April 2024, the put out its first-ever enforceable PFAS drinking water standards, and reverse osmosis has quickly become the top choice for removing PFAS in homes and businesses.
Research from the and the connects PFAS exposure to:
- Cancer: Kidney and testicular cancer (IARC says PFOA is “possibly carcinogenic”)
- Thyroid disease: Messes with thyroid hormone production and how it works
- Immune system suppression: Makes vaccines less effective, increases chances of getting sick
- Reproductive harm: Lowers fertility, causes high blood pressure during pregnancy, leads to low birth weight
- Liver damage: Raises cholesterol, changes liver enzymes
- Developmental effects: Affects how fetuses and children grow and learn
Key Takeaway: PFAS aren’t just about water quality, they’re a serious public health problem. With 97% of Americans having PFAS in their blood and the EPA now setting rules for these compounds at tiny parts-per-trillion levels, getting good water treatment is more crucial than ever.
|
|
|
| 4 |
96-99% |
| 4 |
97-99% |
| 10 |
94-98% |
| 10 |
93-97% |
| 2,000 (HFPO-DA mixture) |
90-95% |
| 10 |
91-96% |
Key Takeaway: RO membranes stop PFAS using two methods- physical size blocking and electrical charge repulsion. This double defense takes out 90-99% of all six EPA-regulated PFAS compounds, consistently dropping their levels below the new MCL standards.
|
|
|
|
| Reverse Osmosis |
96-99% |
90-96% |
$$ |
|
| 90-95% |
50-70% |
$ |
|
| 95-99% |
85-95% |
$$$ |
|
| 90-97% |
70-85% |
$$ |
|
| 40-60% |
10-30% |
$ |
|
The big difference comes down to removing short-chain PFAS. As companies stop making long-chain PFAS (like PFOA and PFOS), they’re using shorter-chain ones instead (like GenX and PFBS). These smaller molecules are tougher to get out of water. GAC and standard carbon filters really struggle with them, but RO systems still manage 90%+ removal rates across all types of PFAS.
Key Takeaway: When purchasing an RO system specifically for PFAS removal, verify it uses TFC (thin-film composite) polyamide membranes. These achieve 90-99% removal of all regulated PFAS compounds, including short-chain variants that other treatment methods struggle with.
Check your water utility’s Consumer Confidence Report (CCR): Public water systems are required to test for PFAS under the new EPA rule. Your annual water quality report should include PFAS data starting in 2025-2026.
Use a certified laboratory: For private wells and independent testing, send samples to an EPA Method 533 or 537.1 certified lab. Labs like Eurofins, SGS, and ALS Environmental offer PFAS testing panels for $200-$400.
Check the EWG PFAS contamination map: The showing known PFAS contamination sites across the United States.
Consider proximity to known sources: If you live near military bases, airports, industrial facilities, or landfills, PFAS contamination risk is significantly higher due to historical use of AFFF firefighting foam and industrial discharge.
NSF/ANSI 58 certification: Confirms the system meets standards for TDS reduction and contaminant removal
NSF P473 certification: Specifically tests for PFOA and PFOS removal (look for this if available)
TFC polyamide membrane: The most effective membrane type for PFAS rejection
Carbon pre-filter stage: Provides additional PFAS adsorption before the RO membrane
TDS monitoring: Built-in TDS meter to verify system performance over time
Adequate capacity: Size the system for your daily water consumption needs
AMPAC USA residential RO systems use high-rejection TFC membranes with multi-stage carbon prefiltration, providing comprehensive PFAS removal that meets and exceeds the new EPA standards. For higher-volume applications, AMPAC commercial RO systems deliver the same PFAS protection at scale.
📚 References & Further Reading
- U.S. EPA: PFAS in Drinking Water
- NSF/ANSI 58: Certified Systems for PFAS Removal
No. Boiling water does not remove PFAS and can actually increase PFAS concentration as water evaporates. PFAS compounds are thermally stable up to extreme temperatures – household boiling has no effect. Only technologies that physically separate or adsorb PFAS (like reverse osmosis, activated carbon, or ion exchange) are effective.
Not necessarily. Consumer Reports testing found detectable PFAS in several bottled water brands. Bottled water is regulated by the FDA rather than the EPA, and as of 2026, there is no specific PFAS limit for bottled water. Producing your own purified water with an RO system provides verified, consistent PFAS removal that you control.
indicates that dermal absorption of PFAS is minimal compared to ingestion. The primary exposure route is drinking contaminated water. However, for individuals with extreme sensitivity or very high PFAS levels, a whole-house RO or treatment system provides complete protection for all water uses.
PFAS compounds rejected by the RO membrane are flushed away in the concentrate (reject) stream, which goes to drain. In residential applications, this water enters the municipal wastewater system. For commercial and industrial applications with high PFAS levels, the concentrate may require specialized disposal. The key point is that PFAS are removed from your drinking water and are not accumulated in the system.
Contact AMPAC USA for a free consultation on PFAS-safe water treatment. Call <(909) 762-8020 or request a quote online.
Conclusion
This post highlighted how emergency and military-grade water purification systems provide safe drinking water rapidly in the most challenging field conditions. For organizations requiring deployable water treatment capability, AMPAC USA engineers portable and trailer-mounted systems built to perform wherever they are needed. Contact our team at info@ampac1.com or (909) 548-4900 to discuss your emergency water treatment requirements.
