PFOA (Perfluorooctanoic Acid) in Drinking Water: Health Risks, Sources, and How to Remove It
PFOA (Perfluorooctanoic Acid) is an organic contaminant. The EPA has set a Maximum Contaminant Level (MCL) of 0.004 μg/L for this substance in drinking water. Because of its potential severity, monitoring and addressing PFOA levels in your water supply is a matter of critical concern.
Health Effects
Exposure to PFOA in drinking water can lead to serious health issues. Research indicates that this organic contaminant is associated with an increased cancer risk and liver damage. Additionally, exposure can cause adverse developmental effects.
How PFOA (Perfluorooctanoic Acid) Gets Into Tap Water
PFOA enters water supplies from several main sources. It is commonly associated with industrial manufacturing and the use of firefighting foam. Runoff and waste from consumer products also contribute to the presence of PFOA in the environment.
How to Remove PFOA (Perfluorooctanoic Acid) From Your Water
Several treatment methods are available to reduce or remove PFOA from drinking water. Granular activated carbon systems and ion exchange technologies are commonly utilized to filter this contaminant. Additionally, reverse osmosis systems can effectively treat water to lower PFOA concentrations.
Should You Test Your Water?
Given the severity of PFOA, you should check your local consumer confidence report or search the WaterQ database for testing results in your area. Private well owners should consider testing their water through a certified laboratory to verify safety. You can also look up your local water system on WaterQ or check the PFOA (Perfluorooctanoic Acid) data page for reported levels in your area.
Frequently Asked Questions
Is PFOA (Perfluorooctanoic Acid) dangerous in drinking water?
Yes, PFOA is an organic contaminant associated with serious health risks in drinking water. Exposure to this substance is linked to cancer risk, liver damage, and developmental effects. Because of these severe impacts, the EPA has set a strict limit on its concentration.
How does PFOA (Perfluorooctanoic Acid) get into tap water?
PFOA enters water systems primarily through industrial manufacturing, firefighting foam usage, and consumer products.
How can I remove PFOA (Perfluorooctanoic Acid) from my water?
You can remove PFOA from drinking water using treatment methods such as granular activated carbon, ion exchange, or reverse osmosis.
Source: EPA National Primary Drinking Water Regulations and WaterQ National Database. For more contaminants, visit our contaminant library.
What actually removes pfas ("forever chemicals")
PFAS are the clearest case where the default advice fails. A standard carbon pitcher is not PFAS-rated and independent testing has repeatedly shown poor reduction. What works is reverse osmosis, or carbon whose media has been specifically tested to the NSF/ANSI 53 PFOA/PFOS claim or NSF P473. Check for that exact wording — "reduces contaminants" on the box means nothing here.
Works
- Reverse osmosis (NSF 58)The broadest removal available at home: arsenic, nitrate, fluoride, PFAS, TDS.
- PFAS-rated carbon (NSF 53 PFOA/PFOS or P473)Carbon with media specifically tested against PFAS. Ordinary carbon is not.
- Anion exchangeWhole-house option for nitrate and uranium on well water.
Will not fix this
- Basic activated carbon (NSF 42)
- Ion-exchange water softener
- UV disinfection (NSF 55)
- Ion-exchange pitcher
- Boiling Makes it worse — evaporation concentrates what's left behind.
Test before you buy.PFAS ("forever chemicals") can't be seen, tasted or smelled, and the right hardware depends on the concentration you actually have. A certified lab test costs a fraction of the wrong filtration system. Start with your local water quality report, and get a mail-in lab test if you're on a private well.
Options that carry the right certification
Ordered cheapest-adequate first. Prices are indicative bands and move often.
| Product | Certification | Upfront | Per year | |
|---|---|---|---|---|
| AquaTru Countertop Reverse OsmosisCountertop | NSF/ANSI 42, 53, 58, 401 and P473 certified.Catch:Takes counter space and you refill a tank by hand. Wastes some water as brine, like all RO. | $400–500 | $80–130 | Check price |
| Aquasana AQ-5200 Under-SinkUnder-sink | NSF/ANSI 42, 53, 401 and P473 certified.Catch:Carbon, not RO — no meaningful fluoride, nitrate or arsenic reduction. | $110–160 | $80–120 | Check price |
| Clearly Filtered Water PitcherPitcher | Independently lab-tested against NSF/ANSI 42, 53, 401 and P473 protocols. Note: tested to those methods, not NSF-listed.Catch:Expensive per gallon and slow to filter. Verify current test reports before relying on the fluoride and PFAS claims. | $80–110 | $90–130 | Check price |
| APEC ROES-50 EssenceUnder-sink | Built with WQA-certified components to NSF/ANSI 58.Catch:Needs an under-sink drain connection and a spare hole for the dedicated faucet. Strips minerals — some people dislike the flat taste. | $180–240 | $50–80 | Check price |
Certification listings change. Before buying, confirm the current listing for the exact model in the NSF certified products database — a manufacturer's marketing page is not a certification. WaterQ earns a commission on purchases made through these links at no extra cost to you; see our affiliate disclosure. This is general information, not medical or engineering advice.
For a full breakdown of certifications, running costs and the models worth considering, see our buying guide for pfas ("forever chemicals").