In situ colloidal activated carbon (CAC), commercially delivered as products like PlumeStop®, provides an effective and field-proven solution for PFAS remediation in groundwater by immobilizing contaminants directly in the subsurface. The technology works by significantly increasing the sorptive capacity of aquifer soils, driving PFAS from the dissolved phase into a stable sorbed state, which reduces mobility, exposure risk, and plume migration. Field data and modeling demonstrate that well-designed CAC barriers can achieve rapid and substantial reductions in PFAS concentrations—often to below detection limits—while maintaining performance for decades or longer. Compared to traditional pump-and-treat approaches, CAC offers a lower-cost, low-maintenance, and waste-free alternative that avoids bringing PFAS to the surface, minimizing long-term liability and environmental risk while delivering immediate and sustained plume control.
- Exceptional PFAS retention and rapid concentration reduction
CAC applications have demonstrated PFAS reductions of up to several orders of magnitude, with many sites achieving concentrations at or below reporting limits shortly after treatment. - Long-term performance measured in decades to centuries
Modeling and field data indicate that properly designed PlumeStop barriers can sustain protective performance over multi-decade to century-scale timeframes, even under continuous loading conditions. - Highly efficient in situ solution with no waste generation
By retaining PFAS in place rather than extracting them, PlumeStop eliminates above-ground waste streams, reducing disposal challenges, regulatory burden, and long-term liability. - Cost-effective alternative to pump-and-treat
CAC-based remediation can achieve equivalent risk reduction at significantly lower lifecycle cost, avoiding decades of active treatment system operation and maintenance. - Proven, scalable, and widely adopted technology
With 50+ global field applications and strong performance across varied site conditions, PlumeStop is established as a reliable, field-implemented PFAS remediation approach.
