As of August 2026, the federal PFAS compliance picture has two important dates: April 26, 2029, and a possible extension to April 26, 2031.
The EPA’s May 2026 proposal would allow eligible public water systems to request two additional years to comply with the federal 4.0 parts per trillion, or ppt, Maximum Contaminant Levels for PFOA and PFOS. The proposal does not remove those limits. It also does not suspend monitoring or reporting.
For water systems, developers, utilities, and owners of environmentally challenged properties across New York and New Jersey, the practical message is simple:
The 2031 option may create additional implementation time. It does not create permission to stop investigating, reporting, designing, or managing PFAS risks.
What the 2026 EPA proposal actually changes
The EPA’s April 2024 National Primary Drinking Water Regulation established enforceable MCLs of:
- 4.0 ppt for PFOA
- 4.0 ppt for PFOS
The May 2026 proposal would create an optional federal exemption framework. Eligible public water systems could request up to two additional years to meet those federal limits, moving the potential compliance date to April 26, 2031.
The proposal remains a proposal as of August 31, 2026. It is not an automatic extension for every water system.
The EPA states that:
“The proposed mechanism does not change the PFOA and PFOS MCLs established in the 2024 PFAS NPDWR which remain 4.0 parts per trillion (ppt) each.”
EPA proposed PFOA and PFOS Compliance Extension Rule
The proposed extension also preserves monitoring and reporting obligations. Systems granted an exemption would still need to collect and report sample results under the April 2024 rule.
Systems with PFOA or PFOS results at or above 12 ppt would also face proposed short-term mitigation requirements during the extension period. Those measures could include certified filters, alternative water supplies, customer notifications, or other controls.
The 2031 date is therefore not a pause. It is a limited planning window for systems that need more time to finance, design, construct, and validate treatment.
New York: a federal extension does not erase the state MCL
New York continues to enforce state-level drinking water MCLs of:
- 10 ppt for PFOA
- 10 ppt for PFOS
The federal 4 ppt limits are more stringent. That creates a layered compliance structure for New York public water systems.
A system cannot assume that an EPA extension automatically extends every state obligation. The system must confirm how the final federal rule will interact with New York’s primacy and enforcement framework. State monitoring, notification, treatment, and reporting requirements may continue on their own schedule.
The New York State Department of Health PFAS drinking water guidance confirms that New York’s state standards remain part of the compliance picture during the federal transition.
For a New York system, the right questions include:
- Is the system subject to the federal PFOA and PFOS NPDWR?
- Does the system qualify for the proposed exemption?
- Has the system applied for and received the extension?
- Which requirements remain enforceable under New York law?
- Will the system’s treatment design target 4 ppt, 10 ppt, or a more protective site-specific objective?
- Are groundwater, source water, and discharge obligations being evaluated separately?
The answer should not come from a generic national compliance memo. It should come from a New York-specific regulatory review supported by current sampling data.
New Jersey: drinking water compliance and cleanup standards are separate issues
New Jersey adds another layer. On June 15, 2026, NJDEP adopted final PFAS remediation standards that include the following groundwater quality standards:
| PFAS compound | NJDEP groundwater quality standard |
|---|---|
| PFOA | 14 ppt |
| PFOS | 13 ppt |
| PFNA | 13 ppt |
| GenX, also known as HFPO-DA | 20 ppt |
These are groundwater remediation standards. They are not the same thing as the federal drinking water MCLs.
A public water system evaluating finished drinking water may be working toward the federal 4 ppt PFOA and PFOS limits. A property owner investigating a contaminated site may need to evaluate groundwater against NJDEP’s applicable remediation standards. A facility discharging treated groundwater may face additional permit conditions.
One standard does not replace the others.
NJDEP’s PFAS program resources explain the state’s scientific and regulatory work on PFAS occurrence, fate and transport, standards, and environmental cleanup.
For a former industrial property in Jersey City, Newark, Hudson County, or another New Jersey redevelopment market, the groundwater investigation should account for:
- The current and reasonably foreseeable groundwater use
- Whether groundwater can affect a potable source
- The horizontal and vertical extent of PFAS
- Potential source areas, including historical industrial operations
- PFAS concentrations in soil, groundwater, surface water, and treatment influent
- NJDEP remediation standards and discharge requirements
- The relationship between the remedy and the proposed site end use
The federal compliance extension does not give a contaminated property additional time to ignore New Jersey remediation obligations.
What this means for Phase II investigations
PFAS changes the way a Phase II ESA and site investigation should be scoped.
A records review may identify historical uses that warrant PFAS consideration, including:
- Firefighting foam storage or training
- Airports and transportation facilities
- Metal finishing and plating
- Textile and carpet manufacturing
- Paper and packaging operations
- Landfills and waste transfer facilities
- Industrial process areas
- Wastewater treatment or biosolids handling
- Facilities with known PFAS-containing products
Field work then needs to answer practical questions. Where is the source? Which media are affected? Is the plume stable or migrating? Does groundwater flow toward a municipal well, surface water body, excavation, or proposed dewatering area?
PFAS sampling also requires disciplined field procedures. Small errors can overwhelm results at the ppt scale. The sampling plan should address equipment materials, decontamination, field blanks, laboratory reporting limits, chain of custody, and potential cross-contamination.
A useful investigation program may include:
- Historical and regulatory records review.
- Source-area screening.
- Monitoring well installation or conversion where appropriate.
- Groundwater elevation and flow evaluation.
- PFAS sampling from selected wells and potential receptors.
- Soil sampling where source persistence or handling decisions require it.
- Data validation and trend analysis.
- A remedy evaluation tied to the applicable cleanup endpoints.
A Phase II report should not simply list PFAS detections. It should explain what the data means for acquisition, construction, treatment, disposal, and regulatory closure.
That distinction matters to lenders and developers. A report that identifies PFAS without describing the next decision leaves the project owner with the hardest part still to solve.
Treatment decisions: GAC, ion exchange, and foam fractionation
The 2031 option may give some public water systems more time to choose and implement treatment. It does not make treatment selection easier.
Three technologies commonly enter the discussion.
Granular activated carbon
Granular activated carbon, or GAC, can remove PFOA and PFOS from water. Performance depends on the carbon type, empty bed contact time, influent concentrations, competing organic matter, pH, and other water chemistry.
GAC requires a replacement and disposal strategy. Breakthrough monitoring is essential. A system that designs only for initial removal performance may face avoidable operational problems later.
Ion exchange
Ion exchange, or IX, can provide strong removal performance and may require a smaller footprint than GAC. Selectivity, resin type, water chemistry, regeneration, and spent-resin management all affect lifecycle cost.
IX can be attractive where space is constrained or where the system needs a high degree of treatment reliability. The decision must include residuals management and long-term operating requirements, not only capital cost.
Foam fractionation
Foam fractionation separates PFAS from water by concentrating surfactant-like compounds in a foam phase. It may be useful for certain source waters, industrial streams, or as part of a treatment train.
It does not eliminate the PFAS mass. It concentrates it into a residual stream that still requires appropriate management. Its suitability depends heavily on water chemistry, PFAS composition, concentration, and system design.
Treatment selection should be based on verified influent data, pilot testing where warranted, residuals planning, operations capacity, and the required endpoint.
We would not recommend choosing GAC, IX, or foam fractionation from a product brochure. The right technology depends on the water, the PFAS profile, the discharge pathway, and the standard the system must meet.
Groundwater cleanup endpoints need a separate analysis
The federal drinking water MCL is an important benchmark. It is not automatically the cleanup endpoint for every soil or groundwater project.
In New Jersey, the adopted groundwater standards provide specific remediation criteria for PFOA, PFOS, PFNA, and GenX. In New York, the state’s 10 ppt drinking water MCLs for PFOA and PFOS remain relevant, while site-specific cleanup decisions may also involve NYSDEC programs, source control, exposure pathways, and institutional or engineering controls.
A defensible cleanup strategy should establish:
- Which agency has jurisdiction.
- Which standards apply to each environmental medium.
- Whether the site presents a current or future potable exposure pathway.
- Whether source removal is feasible.
- Whether groundwater treatment is required.
- How excavated soil and treatment residuals will be characterized and managed.
- What monitoring will demonstrate progress and closure.
- How the remedy fits the construction schedule and intended redevelopment.
This is where soil and groundwater management, Phase II ESA work, and PFAS remediation planning need to operate as one program.
What NY and NJ water systems should do now
The proposed extension may help with schedule pressure, financing, procurement, and workforce constraints. It should not delay the work that determines whether a system can comply.
Water systems and property stakeholders should:
- Track the final EPA rule and confirm whether an exemption is available.
- Continue monitoring and reporting under the current requirements.
- Map PFOA and PFOS results against both federal and state standards.
- Review source water, groundwater, and treatment influent data together.
- Begin treatment pilot testing if capital improvements may be necessary.
- Build a residuals and disposal plan before selecting treatment equipment.
- Coordinate with EPA, NYSDOH, NYSDEC, or NJDEP as applicable.
- Update Phase II ESA scopes and remediation cost estimates.
- Document decisions in a way that lenders, regulators, counsel, and community stakeholders can understand.
The regulatory landscape remains fragmented. The IHMM status summary correctly emphasizes that federal requirements do not necessarily replace stricter state obligations.
For owners and developers, the practical takeaway is even more direct:
A compliance extension is not a cleanup strategy.
How Envicon helps keep PFAS projects moving
Envicon Group supports public agencies, utilities, developers, attorneys, and contractors with PFAS assessment, soil and groundwater management, Phase II investigations, treatment planning, and remediation oversight across New York and New Jersey.
We connect field data to the decision in front of you. That may mean defining a plume before a transaction, selecting groundwater treatment before excavation, managing PFAS-impacted soil, or coordinating with the agency reviewer responsible for project closure.
Our PFAS assessment and environmental investigation services are built around clear scope, defensible data, and actionable next steps. For brownfield sites, our remediation and brownfield redevelopment team carries the work from delineation through remedial design, field oversight, documentation, and regulatory closeout.
From our Jersey City headquarters, we work throughout Hudson County, New York City, and the broader NY/NJ metro market.
The standard may change. The need for accurate data, direct accountability, and a clear path to closure does not.
Sources
- EPA, Proposed PFOA and PFOS Compliance Extension Rule
- EPA, PFAS National Primary Drinking Water Regulation
- New York State Department of Health, Public Water Systems and Drinking Water Standards for PFAS
- NJDEP, PFAS Research and Standards Resources
- IHMM, Current Status of PFAS Regulation at the Federal and State Levels
Talk with an Envicon Engineer
PFAS decisions affect compliance, construction, financing, and long-term site value. Get the technical and regulatory picture before the next sampling event or capital decision.
