A Fleeting Victory in the Ongoing Battle Against PFAS in North Carolina

Introduction

The recent NC Newsline Environment piece, “A Short-Lived Win in a Never-Ending Fight Over Forever Chemicals,” captures a familiar pattern in PFAS governance: a temporary regulatory or legal success that is quickly eclipsed by renewed challenges. As a scientist who has worked extensively on PFAS fate in wastewater sludge, hydrothermal liquefaction (HTL) treatment technologies, and North Carolina water quality policy, I see this episode as a useful lens through which to examine the broader interplay of science, regulation, and municipal infrastructure in the state. Below I provide the scientific and regulatory context needed to understand why such wins are often fleeting, and what durable steps might be taken moving forward.

Scientific Context: PFAS Persistence and Treatment Challenges

Per‑ and polyfluoroalkyl substances (PFAS) are defined by exceptionally strong carbon‑fluorine bonds, which confer resistance to thermal, chemical, and biological degradation. This structural stability underlies their persistence in environmental media and complicates remediation efforts. In municipal wastewater treatment plants (WWTPs), PFAS typically partition to the solid sludge fraction, where concentrations can reach hundreds of parts per trillion (ppt) depending on influent loads and industrial contributions.

Hydrothermal liquefaction (HTL) of sludge has been explored as a potential route to both energy recovery and contaminant destruction. HTL operates at elevated temperatures (250–350 °C) and pressures (10–25 MPa), converting organic matter into bio‑oil, bio‑char, and aqueous phases. Peer‑reviewed studies have shown that HTL can reduce the mass of certain PFAS in the solid bio‑char fraction, but complete mineralization is rarely observed. Instead, PFAS may undergo chain‑shortening transformations or become redistributed into the aqueous or oil phases, where they can persist and potentially re‑enter the environment if not further treated. Consequently, HTL alone does not constitute a guaranteed destruction technology for PFAS; downstream polishing steps (e.g., advanced oxidation, granular activated carbon) are often required to achieve regulatory‑relevant removal efficiencies.

These technical realities underscore why any regulatory action that appears to “solve” the PFAS problem must be scrutinized for its scientific basis and implementation timeline. A win that relies on unproven or partially effective treatment technologies may be short‑lived if compliance monitoring later reveals residual contamination.

Regulatory Landscape: EPA MCLs and NC Policy

In April 2024, the U.S. Environmental Protection Agency (EPA) finalized the National Primary Drinking Water Regulation for six PFAS: PFOA, PFOS, PFHxS, PFNA, HFPO‑DA (GenX), and PFBS. The rule establishes enforceable maximum contaminant levels (MCLs) of 4.0 ppt for PFOA and PFOS individually, and employs a Hazard Index approach for the remaining four compounds, requiring systems to ensure that the summed ratio of each contaminant’s concentration to its health‑based reference value does not exceed 1.0. This federal framework sets a baseline that states may adopt or exceed.

North Carolina has responded to PFAS contamination through a series of state‑level actions. The NC Department of Environmental Quality (DEQ) released a PFAS Action Plan in 2020, which outlined monitoring, source‑reduction, and remediation strategies. In 2021, the General Assembly passed the PFAS Testing Act, mandating PFAS sampling at public water systems and wastewater treatment facilities. More recently, NC DHHS has maintained a health advisory level for GenX in drinking water of 140 ppt, a value derived from toxicological studies and intended to protect sensitive populations.

The short‑lived win described in the NC Newsline article likely reflects a moment when either a state agency, a court, or a local government issued a restriction or guidance that temporarily limited PFAS discharges or tightened monitoring requirements. Such actions are often precipitated by new scientific evidence or heightened public concern. However, without corresponding adjustments to permitting frameworks, funding for treatment upgrades, or clear enforcement pathways, these measures can be undermined by legal challenges, budgetary constraints, or the emergence of new PFAS chemistries that evade existing regulations.

Implications for Municipal Water Systems and Sludge Management

For municipal water utilities, the EPA’s MCLs translate into concrete operational obligations: systems must monitor for the regulated PFAS, report results, and, if exceedances occur, implement treatment or develop alternative water supplies within compliance timelines. Technologies such as ion exchange, high‑pressure membranes, and granular activated carbon have demonstrated efficacy for PFAS removal, but they entail capital and operational costs that can be burdensome for smaller communities.

Simultaneously, WWTPs face the dual challenge of preventing PFAS breakthrough into effluent while managing PFAS‑laden sludge. If sludge is destined for land application, agricultural use, or incineration, the fate of PFAS must be evaluated to avoid secondary contamination. HTL, while promising for energy recovery, does not eliminate PFAS risk without additional treatment layers. Therefore, any regulatory win that eases discharge limits without addressing sludge handling may simply shift the problem from water to solids, creating a false sense of progress.

In North Carolina, the Cape Fear River basin—home to significant industrial PFAS sources such as the Chemours Fayetteville Works facility—illustrates these interdependencies. Downstream communities rely on the river for drinking water, while upstream WWTPs receive PFAS‑contaminated industrial effluent. Coordinated action that aligns effluent limits, sludge management practices, and drinking‑water standards is essential to avoid regulatory whack‑a‑mole.

Conclusion

The “short‑lived win” highlighted in the NC Newsline Environment story serves as a reminder that PFAS regulation is a dynamic, iterative process. Scientific advances continually reshape our understanding of PFAS fate and treatment efficacy, while policy responses must keep pace with both technical feasibility and enforcement capacity. For North Carolina to move beyond episodic victories toward lasting protection, we need:

1. Science‑based standards that reflect the latest toxicological and treatment data, including considerations for PFAS mixtures and transformation products.
2. Integrated regulatory frameworks that simultaneously address drinking water, wastewater effluent, and sludge disposal, preventing contaminant shifting between media.
3. Sustained investment in infrastructure upgrades and technical assistance for municipalities, particularly small and rural systems that lack economies of scale.
4. Robust monitoring and transparency to detect emerging PFAS compounds and verify compliance over the long term.

Only by anchoring regulatory actions in rigorous science and coupling them with practical, funded implementation strategies can we hope to transform fleeting wins into enduring progress in the fight against forever chemicals.