As the U.S. federal government pulls back on certain PFAS drinking water standards, state legislatures across the country are accelerating in the opposite direction. The result is a growing, complex patchwork of PFAS product restrictions that now affects manufacturers selling into virtually every major U.S. market. Two states—Maine and California—have emerged as the most aggressive regulators, but they are joined by a widening coalition that now includes New York, Minnesota, Nevada, Vermont, Colorado, and Washington.
Maine: The Nation’s Broadest PFAS Product Law
Maine’s framework is the most comprehensive state-level PFAS regulation in the United States. Administered by the Maine Department of Environmental Protection, it unfolds in two phases. As of January 1, 2026, the sales prohibition expanded to cover cleaning products, cookware, cosmetics, dental floss, juvenile products (including car seats, strollers, and children’s clothing), menstruation products, textile articles, ski wax, upholstered furniture, and products packaged in fluorinated containers. Any of these products containing intentionally added PFAS may no longer be sold in Maine unless the use has been designated a “Currently Unavoidable Use” (CUU) by the Maine DEP.
The CUU designation process allows manufacturers to apply for temporary exemptions for product categories where PFAS-free alternatives are not yet technically or commercially available. Approved CUU holders must submit a PFAS Notification Form and pay an associated fee. The ultimate goal is a complete sales prohibition on all products with intentionally added PFAS by January 1, 2032—the most ambitious phase-out timeline in U.S. chemical regulation. Maine also operates a product reporting system that requires manufacturers to notify the DEP of PFAS-containing products sold in the state, building a comprehensive database that is publicly accessible.
California: Cosmetics Ban in Force Since January 2025
California’s PFAS-Free Cosmetics Act (Assembly Bill 2771) prohibits the manufacture, sale, delivery, or offering for sale of any cosmetic product containing intentionally added PFAS effective January 1, 2025—the first such prohibition in any U.S. state. California has also implemented restrictions on PFAS in food packaging, juvenile products, and textiles through separate pieces of legislation. The state enforces individual drinking water MCLs of 5 parts per trillion (ppt) for PFOA and PFOS—more stringent than the federal 4 ppt standard—providing both the product and environmental pillars of comprehensive PFAS management.
2025 Legislative Wave
The 2025 state legislative session produced ten new PFAS-related bills that passed both chambers across five states: New York, Nevada, Minnesota, Maine, and California. New York passed restrictions on PFAS in food packaging and cookware. Nevada enacted a juvenile product PFAS ban. Minnesota expanded its existing restrictions to cover more textile categories. The pattern reflects a national consensus among state environmental agencies that federal action is insufficient and that state governments have both the legal authority and the political mandate to act independently.
Drinking Water: A State-Led Story
On the drinking water side, Massachusetts enforces a 20 ppt combined MCL for six PFAS—one of the world’s most stringent standards. Vermont has adopted 10 ppt MCLs for each of five compounds. Michigan enforces 8 ppt each for PFOA and PFOS. New Hampshire, Connecticut, and several other states have established MCLs at or below the federal levels for PFOA and PFOS. The practical effect for water utilities and filter manufacturers is that the most commercially relevant U.S. markets—New England, the Great Lakes region, and California—enforce standards that require demonstrated multi-compound PFAS removal, regardless of what happens to the federal rule.
Implications for OEM Filter Manufacturers and Product Brands
The state-by-state patchwork creates significant compliance complexity for manufacturers selling nationally. A product line that includes cookware, textiles, or personal care items must now be evaluated against at least a dozen different state PFAS standards with different thresholds, phase-in dates, and exemption procedures. Filter media manufacturers face a different opportunity: the proliferation of state MCLs—many more stringent than federal standards—sustains demand for high-performance PFAS filtration systems that can achieve removal across multiple compounds simultaneously. NSF/ANSI certification to individual state-level performance thresholds, rather than merely the federal standard, is increasingly the market-entry requirement for major U.S. water utility procurement.