Per- and polyfluoroalkyl substances (PFAS) regulation has moved into a more demanding phase. The question is no longer only whether PFAS is present. It is whether owners and operators can identify the risk early, understand what the regulations require, and treat the right water in the right way without creating new operational or disposal burdens.
That distinction matters. PFAS is often discussed as a drinking water issue, but the practical challenge is broader. PFAS moves through source water, groundwater plumes, industrial process streams, wastewater, landfill leachate and, in some regions, produced water. Regulators are responding in the same way. Standards, monitoring requirements and cleanup expectations are expanding across water types, and the compliance burden is becoming more state-specific. EPA’s national drinking water rule set a new baseline in 2024, but states continue to shape how PFAS risk is monitored, prioritized and managed in practice.
That shift favors providers built for the full problem, not a single step in the process. At Onterris, our advantage is not only treatment. It is the ability to bring testing and analysis, consulting and compliance, and treatment services together in-house. That matters because PFAS projects rarely stay in one lane. A sampling program can become a permitting issue. A groundwater finding can become a drinking water concern. A compliance question can turn into an urgent treatment project. When those services sit under one roof, decisions move faster and project risk drops.
Onterris’s own company materials describe a specialist water treatment business with experience across groundwater, surface water, wastewater, leachate and drinking water, supported by design and engineering, installation and construction management, startup and commissioning, and operations and maintenance. The brochure also emphasizes rapid deployment, regulatory-compliant solutions, and PFAS treatment capability across wastewater, groundwater, drinking water, surface water and construction dewatering.
The five-state signal is clear
California, Texas, New York, Illinois and North Carolina are not following a single path, but they are moving in the same direction. Each state is increasing pressure on utilities, industrial operators and remediation teams to understand PFAS risk earlier and respond with defensible treatment strategies.
California continues to expand monitoring and advisory action. The State Water Board states that its Division of Drinking Water has initiated revisions to notification and response levels for PFOA, PFOS and PFHxS and is establishing notification and response levels for PFHxA. California also issued a 2025 general order requiring initial PFAS monitoring for public water systems. That combination of broader monitoring and evolving advisory thresholds increases the value of providers that can support sampling strategy, compliance interpretation and treatment implementation in one sequence.
New York remains one of the most established PFAS regulatory markets in the country. The New York State Department of Health states that the state set maximum contaminant levels of 10 parts per trillion for PFOA and PFOS in 2020, and that public water systems must continue to meet those state standards until tighter federal levels apply in 2029. New York is also working on additional standards and notification levels for more PFAS compounds. That creates a market where low-level treatment performance and long-term operating reliability matter, but where analytical confidence and regulatory judgment matter just as much.
Illinois has expanded PFAS oversight in both groundwater and drinking water contexts. Illinois EPA states that amendments effective March 28, 2025 added groundwater quality standards for six PFAS compounds. The agency has also notified community water systems when PFAS detections in supply wells exceeded newly established groundwater standards, linking regulatory action to public communication and stakeholder scrutiny.
North Carolina is pairing federal drinking water implementation with strong state action on groundwater and broader water quality protection. The Department of Environmental Quality established interim maximum allowable concentrations for eight PFAS in groundwater in October 2024. DEQ also states that PFAS data are now available across more than 800 public water systems, reflecting a broad statewide sampling effort. North Carolina’s own framing is especially important: the state says reducing PFAS in drinking water supplies, surface water and groundwater requires state action, not just federal rulemaking.
Texas is often treated as a simpler drinking water market, but that misses an important second story. TCEQ is implementing the federal PFAS drinking water rule for public water systems, including monitoring and a compliance timeline tied to the national regulation. At the same time, the Railroad Commission of Texas has established a regulatory framework for produced water recycling pilot studies, creating a pathway to test the effectiveness and suitability of treated produced water for beneficial purposes. In a state shaped by both municipal water needs and oil and gas operations, PFAS treatment is increasingly connected to both compliance and water reuse strategy.
The market is shifting from “Can it remove PFAS?” to “Can it solve the whole project?”
That is where Onterris has a stronger story to tell.
PFAS treatment decisions are becoming more water-type specific. Surface water carries different solids, organic content and seasonal variability than groundwater. Industrial process water brings co-contaminants, temperature swings and variable chemistry. Drinking water projects need stable, validated performance and clean operational integration. Produced water presents an entirely different challenge, often requiring a staged treatment approach and careful pilot evaluation before full deployment.
A provider built only around one matrix will struggle as regulation broadens. A provider built only around treatment may also struggle, because many PFAS projects fail upstream of treatment selection. They fail in characterization, in analytical planning, in regulatory interpretation, or in the handoff between investigation and implementation.
At Onterris, our position is stronger because the service model is broader. With testing and analysis, consulting and compliance, and treatment services in-house, Onterris can help clients move from detection to decision and from decision to delivery. That integrated model reduces friction at the exact moment when timelines are tightening and stakeholder expectations are rising.
The company’s brochure supports that operating model. It describes capabilities that extend from design and engineering through installation and construction management, startup and commissioning, and operations and maintenance. It also highlights real-world PFAS treatment applications across wastewater, groundwater, drinking water and surface water, along with rapid deployment for urgent contamination events.
Why full-service capability matters now
A PFAS response should do more than achieve removal in a pilot or on paper. It should fit the water, the site and the regulatory pathway.
For drinking water, operators need performance they can trust over time, often at very low concentrations. EPA’s national PFAS drinking water regulation established maximum contaminant levels for PFOA and PFOS at 4 parts per trillion, and hazard index requirements for several other PFAS. That raises the bar for treatment reliability, media strategy and monitoring discipline.
For groundwater, speed and deployment flexibility matter. A plume does not wait for a perfect capital schedule. States such as Illinois and North Carolina are reinforcing that point by setting groundwater benchmarks that move PFAS out of the abstract and into active site management.
For surface water, variability matters. Seasonal loading, natural organic matter and upstream source shifts can change treatment behavior and operating cost. California and North Carolina both show why source-water awareness is becoming a core part of the PFAS response, not a secondary concern.
For industrial process water, system resilience matters. Facilities need treatment that can work alongside operations, not against them. PFAS management in industrial settings often requires a balance of removal efficiency, footprint, uptime and residual handling, but it also depends on accurate characterization and a clear compliance strategy before equipment ever arrives on site.
For produced water, caution and technical range matter. Texas has made clear that produced water treatment and beneficial use will develop through pilot pathways that assess health, safety, feasibility and economics. That is not a standard skid deployment. It requires a provider that understands staged evaluation, data quality and fit-for-purpose process design.
The next differentiator is not just removal. It is execution.
As the PFAS market matures, buyers are asking better questions.
How confident are the analytical results? What does the regulatory pathway require in this state? How much waste will the system generate? How often will media need replacement? How much downtime will maintenance require? Can the system be installed quickly? Can it be scaled as influent conditions change? Can one team manage the problem from testing through compliance support to treatment operations?
Those are the questions shaping project success now, particularly in states where PFAS oversight is widening. More monitoring creates more projects. More projects expose the difference between a theoretical solution and an operational one.
That is why our broader service model matters. An integrated platform gives clients more than flexibility. It gives them continuity. Testing and analysis help define the problem correctly. Consulting and compliance services help determine what the regulations mean for that specific site, utility or facility. Treatment services then translate that strategy into action. Each part strengthens the others.
This is especially valuable in the five states in focus. California rewards early action and adaptable implementation. New York rewards reliable performance at very low levels. Illinois rewards providers that can work across groundwater risk, public communication and long-term compliance. North Carolina rewards upstream thinking across drinking water, groundwater and surface water protection. Texas rewards strategies that can bridge municipal compliance and industrial water realities.
What this means for clients now
These five states point to the same conclusion: PFAS compliance is becoming a full-project decision, not just a treatment-media decision.
A groundwater issue can become a drinking water issue. A source-water issue can become an operational issue. An industrial stream can become a permitting issue. A produced water pilot can become a long-term water management strategy.
That is why clients increasingly need more than a treatment vendor. They need a partner that can test, interpret, advise and treat. Onterris is well positioned for that reality because its model brings environmental science and service delivery together: testing and analysis, consulting and compliance, and treatment services, all in-house. Supported by field delivery, engineering, commissioning and operations capability, that approach is built for PFAS projects that cross technical and regulatory boundaries.
The companies best prepared for the next PFAS cycle will not be the ones that talk only about removal efficiency. They will be the ones that solve the whole problem, from characterization through compliance to long-term treatment performance.