The EPA has two active proposed rulemakings that would reshape drinking water protections for PFAS compounds in the United States. The comment period for both closes July 20, 2026. Neither changes what is currently in your tap water today. Both change what utilities are required to do about it, and by when.
Understanding the distinction between these proposals matters for business owners and facilities managers who make water quality decisions for the people in their buildings.
What the First Proposal Would Change
The EPA's proposed compliance extension rule would uphold the drinking water standards for PFOA and PFOS, the two most widely studied PFAS compounds, while extending the deadline for water utilities to comply from 2029 to 2031. The standards themselves, 4 parts per trillion for each compound, would remain in force.
The extension is designed to give utilities additional time to finance treatment infrastructure, construct systems, and test removal technologies. The EPA frames the extra time as practical rather than regulatory retreat: utilities that cannot comply by 2029 face real construction and funding timelines that violations alone would not accelerate.
For businesses in markets where utilities are still operating above the 4 ppt standard, this proposal means two additional years before any legal obligation to treat kicks in. A GAO study from September 2024 found that 77 percent of water systems with PFAS detections above EPA limits had not yet implemented a treatment method. Those systems serve businesses and residents today.
What the Second Proposal Would Change
The EPA is simultaneously proposing to rescind drinking water standards for four additional PFAS compounds: PFHxS, PFNA, HFPO-DA (commonly known as GenX), and the hazard index mixture of these three compounds plus PFBS. That proposed rule would eliminate the enforceable limits for those compounds entirely.
These four compounds are shorter-chain PFAS developed as replacements when manufacturers phased out PFOA and PFOS under prior regulatory pressure. Their health effects are subject to ongoing research. Eliminating their standards does not mean they are absent from public water supplies. It means utilities would no longer face legal obligations to monitor for or remove them.
Both proposed rules had a virtual public hearing on July 7, 2026. The written comment period for both closes July 20, 2026.
What These Proposals Mean for Your Building's Water
The regulatory timeline and your building's actual water quality are two separate things. Whether utilities receive two additional years to comply with PFOA and PFOS standards, or whether four other PFAS compounds lose their standards entirely, neither outcome changes the PFAS load in the water running through your building's pipes today.
The EPA's non-enforceable health goal for PFOA and PFOS is zero. The agency's own scientific assessment states that no known level of exposure to those compounds is without health risk. The 4 ppt standard exists because treating to zero is not achievable at scale, not because the EPA considers 3.9 ppt safe.
For businesses providing water to employees, healthcare patients, or clients daily, compliance status at the utility level is not a reliable proxy for water quality at the point of use. A utility in compliance can still deliver water with detectable PFAS. A utility operating under an exemption must notify customers, but that notification arrives annually, not when the exemption is first granted.
What On-Site Purification Provides
A multi-stage bottleless water purification system using reverse osmosis at the point of use removes PFAS regardless of what the municipal supply delivers on any given day, what the utility's compliance timeline is, or what the regulatory status of specific PFAS compounds becomes after July 20.
The reverse osmosis membrane operates at the molecular level. It rejects dissolved ionic compounds including PFAS. Water molecules pass through; PFAS compounds do not. Pre-treatment carbon stages address chlorine and organic compounds that degrade the membrane over time. The output reflects what the system removes, not what the municipal source contains.
Healthcare facilities serving patients with compromised immune function, manufacturing and warehouse operations where workers hydrate from the same source across full shifts, and office environments where dozens of employees drink from the building's supply every working day — these are contexts where the regulatory outcome on July 20 does not change the purification calculus. The water quality the building delivers is the only variable those businesses control.
Bottleless Nation serves businesses across Dallas-Fort Worth, Houston, Phoenix, Philadelphia, Chicago, Indianapolis, Nashville, and 30 additional markets nationwide.
Talk to our team about what is in your building's water and what we can do about it.
Frequently Asked Questions
What is the EPA proposing to change about PFAS drinking water standards?
Two separate proposals are active. The first would extend the compliance deadline for PFOA and PFOS from 2029 to 2031 while keeping the 4 parts per trillion standard in place. The second would rescind drinking water protections for four additional PFAS compounds, PFHxS, PFNA, HFPO-DA (GenX), and the PFBS hazard index mixture, eliminating their enforceable limits entirely.
When does the public comment period close?
The written public comment period for both proposals closes July 20, 2026. Comments can be submitted at regulations.gov under docket ID EPA-HQ-OW-2025-1742 for the compliance extension. The EPA held a virtual public hearing on July 7, 2026 covering both proposed rules.
Does the compliance deadline extension mean utilities can ignore PFAS in the water?
Systems that cannot comply by 2029 could request a two-year exemption under the proposed extension, giving them until April 2031. Systems granted the extension must notify the people they serve. Under the proposal, systems with PFOA or PFOS detections at or above 12 parts per trillion must implement short-term mitigation actions during the exemption period.
How does this affect my building's water quality today?
Neither proposal changes the PFAS levels currently in public water supplies. The EPA's health goal for PFOA and PFOS is zero, and the 4 ppt standard represents a compliance threshold, not a safety threshold. Water testing at 3.9 ppt is legally compliant. The EPA's own health guidance says that level carries risk. A regulatory extension does not change what the supply contains.
Does reverse osmosis remove PFAS from drinking water?
Yes. Reverse osmosis is one of the most effective point-of-use technologies for PFAS removal. The semi-permeable RO membrane rejects dissolved ionic compounds at the molecular level, including PFAS. A multi-stage purification system with pre-treatment carbon stages removes PFAS along with lead, arsenic, nitrates, and disinfection byproducts regardless of what the municipal supply delivers.
Do businesses in affected markets need to do anything before July 20?
Business owners who want to comment on the proposed rules can submit written comments at regulations.gov before July 20. For businesses focused on protecting their own water supply rather than the rulemaking process, on-site point-of-use purification is the action that addresses the water quality directly. The regulatory outcome does not change what an RO system removes.