Your Builder Used Twelve Products With Forever Chemicals. Three of Them Are Already Illegal.
Go walk through a new-construction home and count the surfaces that promise to repel something. Stain-resistant carpet, weatherproof exterior paint, water-repellent interior paint, water-resistant tile grout, scuff-proof wood-floor finish, oil-repellent countertop sealant. Moisture-blocking window flashing, UV-resistant roofing membrane, treated asphalt shingles, caulk around every bathroom penetration, furniture fabric engineered to survive whatever your children will inevitably spill on it over the next decade of sippy cups and art projects and pizza dinners eaten on the couch because nobody felt like setting the table, and PTFE-insulated electrical wiring running silently through every wall cavity. Twelve products. Resistance is the sales pitch for nearly every finish in the house, and what nobody mentions is how that resistance is achieved or what it leaves behind when the building comes down in sixty years.
For a startling number of those products, the answer is per- and polyfluoroalkyl substances, known as PFAS, known colloquially as forever chemicals, and found in the blood of 97% of Americans according to the Centers for Disease Control and Prevention. Their carbon-fluorine bonds are so strong that nothing in nature has ever evolved a mechanism to break them apart, which is precisely what makes them useful to manufacturers and catastrophic to everyone else.
As of January 2026, some of those products are illegal to sell in three states.
Floor to Roof
A 2021 report from the Green Science Policy Institute was the first to catalog exactly how deep PFAS run in building materials, and the list stretches further than anyone outside polymer chemistry expected: carpets and rugs treated with side-chain fluoropolymers for stain resistance, paints and exterior coatings formulated for water repellency, sealants and caulks and adhesives used in weatherproofing and flooring installation, grout and stone sealers marketed as oil-and-water-resistant, flashing tapes that seal windows and doors against moisture infiltration while silently introducing persistent organic pollutants into the building envelope. Metal roofing coated with polyvinylidene fluoride for self-cleaning properties and asphalt shingles treated for reflectivity and longevity. Even PTFE-insulated electrical wiring running through your walls, carrying current through conduit wrapped in chemistry that will outlast the copper inside it by centuries.
"It's worrisome that PFAS may be literally wall-to-wall in our homes and offices," said Tom Bruton, senior scientist at the Green Science Policy Institute. "But the good news is that safer alternatives already exist."
Alternatives range from silicone and paraffin-based carpet treatments to nanosilica coatings for tile, to tighter-weave fabrics that achieve water resistance through structure rather than chemistry, approaches that perform the same function without creating a permanent environmental liability in every square yard of installed material. Home Depot and Lowe's already pulled PFAS-treated carpets from their shelves nationally, and San Francisco banned PFAS carpets in new commercial construction, so the replacements are not theoretical propositions awaiting pilot programs and feasibility studies.
Most builders, however, do not ask what is in their sealant, because the question they actually care about is whether it works.
The Regulatory Patchwork
Three states now ban PFAS in categories that directly affect new home construction, and a fourth requires disclosure, creating a compliance landscape that shifts depending on where you source materials and where you pour the foundation.
California's AB 1817, effective January 1, 2025, prohibits PFAS in textile articles above 100 parts per million of total organic fluorine, a threshold that drops to 50 ppm by 2027 and captures furnishing fabrics, upholstery, draperies, bedding, towels, and shower curtains sold in the state. It does not cover carpets, but it covers nearly everything else a buyer might touch in a furnished model home, and outdoor apparel for severe wet conditions, though exempt until 2028, must already carry a label reading "Made with PFAS chemicals."
Minnesota's Amara's Law, passed in 2023 with bans taking effect January 2025, reaches further into the product stack than any other state law in the country. Eleven product categories are affected: carpets and rugs, upholstered furniture, textile furnishings, fabric treatments, cookware, cleaning products, cosmetics, dental floss, juvenile products, menstruation products, and ski wax. By January 1, 2032, all consumer products containing intentionally added PFAS will be prohibited statewide. A June 2025 amendment carved out products where PFAS appear only in electronic or internal components, but the core ban is sweeping enough that builders sourcing finished goods for model homes and spec houses need to verify every supplier certificate in their procurement chain.
Vermont's Act 131, effective January 1, 2026, bans PFAS in residential rugs and carpets, aftermarket stain treatments, textiles, juvenile products, cookware, and artificial turf at a threshold of 100 ppm total organic fluorine, dropping to 50 ppm by July 2027, with a June 2025 expansion adding dental floss, cleaning products, and fluorine-treated containers to the prohibited list.
Washington's law, also effective January 2026, stops short of a ban but requires manufacturers to disclose and track PFAS content above 50 ppm in outdoor textile furniture, hard surface sealers, floor waxes, cookware, and footwear.
Twelve states have enacted PFAS product regulations as of mid-2026, according to a Morgan Lewis analysis, and the EU's chemicals agency recommended a broad ban in March 2026 with legally binding restrictions expected by year-end, which means this is not a coastal American phenomenon that builders in the interior can safely ignore for a few more legislative cycles.
The Number That Should Terrify Builders
Forget the regulatory complexity for a moment and focus on one data point.
15,530 parts per trillion. That is the average PFAS concentration in leachate from construction and demolition landfills in Florida, according to a study published in Waste Management. The EPA's enforceable drinking water limit for PFOA and PFOS is 4 parts per trillion.
Divide those numbers. You get 3,883 to 1.
When a house is demolished, its carpet, roofing, sealants, paint, and treated fabrics are hauled to construction and demolition landfills, and most C&D landfills in the United States are unlined, which means leachate percolates directly into the groundwater that feeds wells and eventually, by routes no engineer drew on a diagram, reaches the same aquifers that public water systems draw from at enormous expense to filter. According to the Environmental Working Group, Minnesota identified PFAS in 100 closed landfills, with sixteen sites at ten times above state drinking water standards; New Hampshire found 77.5% of sampled landfills exceeding state limits; New York found groundwater contamination at 70% of inactive landfills surveyed; and California detected PFAS in the leachate of all 84 sampled landfills.
Every state they tested, they found it.
A house built today with PFAS-treated carpet, sealants, and roofing will, when it reaches the end of its useful life, contribute building debris leaching PFAS at concentrations nearly four thousand times the EPA's drinking water limit into unlined disposal sites that drain to groundwater. Lloyd Alter, writing in GreenBuildingAdvisor in September 2025, titled his analysis "PFAS: The Building Industry's Next Asbestos?" and the comparison is structurally precise rather than rhetorical: DuPont and 3M knew since the 1970s that certain PFAS compounds were toxic and suppressed the information, a pattern indistinguishable from what Johns Manville did with asbestos decades earlier. Asbestos abatement today costs between $2,000 and $30,000 per home, and the eventual cost of PFAS remediation in building materials remains unknown, because nobody has yet devised a method to remediate a chemical whose defining property is that it does not break down.
The Strongest Case Against Alarm
Before following the money, it is worth hearing the strongest version of the case against panic, because the chemical industry makes it clearly and it is not entirely wrong. Fluoropolymers like PTFE in electrical wiring insulation and PVDF in metal roofing coatings are high-molecular-weight compounds that do not dissolve in water, do not bioaccumulate in the body the way shorter-chain PFAS do, and are not the same chemicals driving the EPA's drinking water limits or the billion-dollar litigation settlements. The American Chemistry Council has argued, with some scientific support, that regulating all 14,000-plus PFAS as a single class treats compounds with vastly different risk profiles as interchangeable, potentially driving builders away from durable, well-performing materials without a proportionate health benefit.
That distinction matters, and it does not resolve the problem. C&D landfill leachate studies do not isolate which PFAS compounds are leaching from which building materials, so a builder who installs PVDF roofing and PFAS-treated carpet cannot tell the regulators or the groundwater which chemical came from which product. And the state laws do not carve out fluoropolymers: Minnesota's 2032 all-product ban covers intentionally added PFAS in any amount, which includes the PVDF on your roof and the PTFE on your wiring alongside the side-chain fluoropolymers on your carpet, a legislative choice that reflects the precautionary principle rather than compound-by-compound risk assessment.
The Money Trail
Litigation is enormous and accelerating. 3M agreed to pay $10.3 to $12.5 billion over thirteen years to settle PFAS contamination claims from water providers. DuPont, Chemours, and Corteva collectively reserved $4 billion and settled water provider claims for $1.185 billion, and more than 5,600 cases are consolidated in federal multidistrict litigation in the District of South Carolina, a judicial pipeline so large that the court has organized claimants into phases and subclasses the way a general contractor organizes a subdivision into lots. In July 2026, New York Attorney General Letitia James sued 3M, DuPont, and related entities not over industrial firefighting foam but over consumer products, a legal theory that reaches directly into building materials, household goods, and the supply chains that deliver them to your jobsite.
That lawsuit matters. Prior PFAS litigation focused on aqueous film-forming foam used at military bases and airports. Consumer-product liability opens a different door, one that leads through every distributor, retailer, and installer in the building materials chain.
On the water side, EPA's April 2024 drinking water rule set enforceable maximum contaminant levels of 4 ppt for PFOA and PFOS, confirmed unchanged by the current administration in May 2026, and between 3,400 and 6,300 public water systems serving 70 to 94 million people will need new treatment infrastructure to comply. EPA projects $1.5 billion in annual compliance costs once systems are operating, but the American Water Works Association, using data from Black & Veatch, estimates $47 billion in one-time treatment infrastructure installation before those annual costs even begin, plus $700 million per year in ongoing operations on top of that, which means the total bill over the first decade is closer to $60 billion than $15 billion, and the gap will be closed by ratepayers who had no say in which chemicals their builder chose.
Those costs will arrive on water bills. If you are on municipal water, expect increases. If you are on a private well, nobody is monitoring your water for PFAS and the federal rule does not cover you. Testing a private well for the six regulated PFAS compounds costs approximately $300 to $500 through certified laboratories, less than a home inspection and considerably less than the remediation that might follow.
What a Builder Should Do Now
If you are building in California, Minnesota, Vermont, or Washington, your material procurement team needs to audit finish specifications immediately, because stain-resistant carpet treatments, fabric protectants, hard-surface sealers, and floor waxes are the highest-risk product categories and the compliance deadlines have already passed. Ask suppliers for certificates of compliance documenting total organic fluorine content. If they cannot produce one, assume the product contains PFAS, because in every state that has legislated thresholds, the burden of proof now sits with the manufacturer, not the builder, and "I didn't know" is not a defense that any state attorney general has ever accepted twice.
If you are building anywhere else, audit anyway. Minnesota's 2032 all-product deadline is the leading edge of a national trajectory, and sourcing PFAS-free alternatives now avoids a supply chain scramble when your state follows the same legislative arc that California, Minnesota, Vermont, and Washington have already traced. Cost differentials are smaller than most builders assume: PFAS-free carpet is at price parity with treated carpet at major retailers because the retailers themselves forced the transition, and PFAS-free sealants and coatings carry a modest premium of 5% to 15%, though the selection is narrower, which means lead times matter more than price.
If you are buying a new home, ask your builder three questions: what stain treatment is specified for carpet or fabric, what sealant is used on tile and grout and stone, and what coating is applied to the roofing. A builder who cannot answer has not looked, and in a regulatory environment tightening by the quarter, not looking is the most expensive decision available.
If you are on a private well within a mile of a construction and demolition landfill, or any former industrial site, test your water. EPA's maximum contaminant level goal for PFOA and PFOS is zero, meaning the agency concluded that no level of exposure is without health risk, and a single certified test costs roughly what you spend on a nice dinner while the contamination it identifies could cost you tens of thousands to address.
Limitations
The 15,530 ppt leachate concentration comes from a study of Florida C&D landfills and may not represent conditions in other states, climates, or regulatory environments. Our 3,883:1 ratio against the EPA's 4 ppt MCL is arithmetic and does not account for dilution, attenuation, and transport dynamics that determine actual PFAS concentrations at any given drinking water well. The cost differential between PFAS-containing and PFAS-free building products is based on retail observation and manufacturer claims, not a controlled procurement study across multiple markets. No national survey of builder material specifications for PFAS content exists, so we cannot determine what percentage of homes currently under construction use PFAS-containing products in each category. Settlement amounts cited reflect negotiated agreements, not adjudicated findings of liability; the companies involved have denied wrongdoing. The twelve-state regulatory count is based on a January 2026 Morgan Lewis analysis and the number has likely increased since publication.