PFAS removal at the tap is achievable with the right combination of testing and treatment. At De Anza Water Conditioning, Inc, we help San Jose, Los Gatos, Campbell, Saratoga, Cupertino, and Santa Clara families identify forever chemicals in their water and choose reverse osmosis, activated carbon, or ion exchange systems suited to their specific results.
Every home’s water tells a different story, and for many Silicon Valley households, that story now includes PFAS. We at De Anza Water Conditioning, Inc have spent decades helping South Bay families understand what’s actually in their water, and PFAS removal has become one of the most common questions we hear. These “forever chemicals” don’t break down naturally, which means water contamination from PFAS can persist in groundwater and municipal supplies for years without proper treatment. The good news is that effective, verified PFAS removal is well within reach once you know what your water actually contains.
What Are PFAS and Why Do They Show Up in Drinking Water?
PFAS, or per- and polyfluoroalkyl substances, are a large family of manufactured chemicals used in nonstick cookware, stain-resistant fabrics, firefighting foam, and industrial coatings. They earned the nickname “forever chemicals” because their carbon-fluorine bonds resist natural breakdown, allowing them to accumulate in soil, groundwater, and eventually drinking water systems. Water contamination from PFAS typically traces back to industrial discharge, airport or military firefighting foam use, and landfill runoff, which is why testing near these sources matters so much.
Because PFAS compounds move easily through soil and water, they aren’t confined to the sites where they were originally used. This is part of why the EPA has continued monitoring and regulating PFAS in public water systems, even as the specific rules evolve.
How Serious Is PFAS Water Contamination Across Silicon Valley?
Locally, the picture is more reassuring than in many parts of the country, but ongoing vigilance still matters. Valley Water, which manages the Coyote, Guadalupe, Uvas-Llagas, West Valley, and Lower Peninsula watersheds serving Santa Clara County, operates an accredited water quality laboratory that actively tests treated supplies for PFAS. Their most recent groundwater monitoring shows the six federally regulated PFAS compounds have not been detected in the treated water delivered through their three treatment plants to area retailers.
That said, private wells, older infrastructure, and localized contamination near industrial or airport sites can still carry risk, which is why we encourage homeowners throughout San Jose, Los Gatos, Campbell, Saratoga, Cupertino, and Santa Clara to review their utility’s annual Consumer Confidence Report and consider independent testing, especially if their water source differs from the municipal supply. Your local CCR is one of the fastest ways to see exactly which contaminants have been detected in your specific service area.
- PFAS chemicals resist natural breakdown, which is why they are commonly called “forever chemicals.”
- The EPA’s current federal drinking water limit for PFOA and PFOS is 4 parts per trillion, among the strictest contaminant thresholds in the country.
- Reverse osmosis, activated carbon, and ion exchange are the three treatment technologies with the strongest track record for PFAS removal.
- Valley Water’s treated supplies serving Santa Clara County have not detected the six federally regulated PFAS compounds as of the latest monitoring.
- Private wells are not covered by municipal testing requirements, so independent testing is the only way to know what they contain.
What Health Risks Are Linked to PFAS Exposure?
Long-term PFAS exposure has been associated with a range of health concerns currently under active study by federal researchers. The CDC’s Agency for Toxic Substances and Disease Registry has been conducting a multi-site study specifically examining the relationship between PFAS-contaminated drinking water and health outcomes in communities across the country, including populations exposed through municipal and private wells. Findings so far point to potential links with cholesterol changes, immune response effects, and other outcomes, though researchers note that evidence continues to develop for many specific conditions.
Clinicians and environmental health professionals increasingly work together on PFAS exposure reduction, since drinking water can be a primary exposure pathway in communities with known contamination, alongside food packaging and certain consumer products. This is one reason we recommend pairing any home treatment decision with a conversation with your doctor if you have specific health concerns, rather than relying on water treatment alone.
What’s the Most Effective Method for PFAS Removal at Home?
Reverse osmosis is widely regarded as one of the most effective point-of-use methods for PFAS removal, since its fine membrane filtration captures a broad range of PFAS compounds along with other dissolved contaminants. Activated carbon filtration, particularly granular activated carbon, also performs well against many PFAS compounds and is often used in whole-house configurations. Ion exchange resins offer another option, particularly effective against certain PFAS chain lengths, and are sometimes combined with carbon filtration for broader coverage.
No single system fits every household, since the right approach depends on which PFAS compounds are present, their concentration, and your home’s existing plumbing and water pressure. We walk through exactly how membrane filtration performs against PFAS and other contaminants in our guide to reverse osmosis water purity systems, which is worth reviewing before deciding on a treatment path.
How Do You Know If You Need PFAS Testing?
You need PFAS testing if your water source is a private well, if you live near a known contamination site such as an airport or industrial facility, or if you simply want independent confirmation beyond what your municipal CCR reports. Many contaminants, including PFAS, produce no taste, odor, or color changes, so water can look and taste completely normal while still containing measurable levels of forever chemicals. We cover several other warning signs worth watching for in our article on the signs you need professional water testing even when your water looks fine.
For a broader picture of what else might be present in South Bay water supplies beyond PFAS, our complete guide to water contaminants in Silicon Valley breaks down the other substances we test for most often across San Jose, Los Gatos, Campbell, Saratoga, Cupertino, and Santa Clara homes.
Frequently Asked Questions About PFAS Removal
Can a water softener remove PFAS from drinking water?
A standard water softener does not remove PFAS, because softeners are designed to address hardness minerals like calcium and magnesium rather than organic compounds. PFAS removal requires technologies such as reverse osmosis, activated carbon, or ion exchange, which target these specific chemical compounds rather than mineral content.
How do I test my home’s water for PFAS?
Testing your home’s water for PFAS requires a certified laboratory sample, since PFAS cannot be detected by taste, smell, or appearance. We collect samples from your tap and send them to an accredited lab, then walk you through the results and any recommended next steps for treatment.
Is reverse osmosis better than activated carbon for PFAS removal?
Reverse osmosis generally captures a broader range of PFAS compounds than activated carbon alone, though both can be effective depending on which specific compounds are present in your water. We often recommend combining both technologies for households seeking the most comprehensive protection against forever chemicals.
Is Silicon Valley tap water safe from PFAS contamination?
Treated water delivered by Valley Water to Santa Clara County retailers has not shown detections of the six federally regulated PFAS compounds in recent monitoring, though private wells and localized sources can still carry risk. Reviewing your local Consumer Confidence Report and testing independently, especially if you rely on a private well, is the most reliable way to confirm your specific water quality.
Further Reading & References
- U.S. EPA – Per- and Polyfluoroalkyl Substances (PFAS)
- CDC/ATSDR – PFAS Multi-Site Health Study
- National Institutes of Health – PFAS Information for Clinicians
- Valley Water – PFAS Groundwater Quality Monitoring
At De Anza Water Conditioning, Inc, we’ve helped families across San Jose, Los Gatos, Campbell, Saratoga, Cupertino, and Santa Clara get clear, accurate answers about what’s in their water and how to fix it. If forever chemicals or other contaminants have you wondering about your own tap, request a free PFAS water test from our team and we’ll help you find the right removal solution for your home.
