Sentinel Water Solutions, a division of Keystone Clearwater Solutions, is a dedicated unit focused on delivering cost-effective, turnkey treatment systems for PFAS and other emerging contaminants in drinking and wastewater. They support utilities through every phase—from pilot testing and modeling, to full system design, operations, media services, reactivation, and disposal.

Founded with a mission to make PFAS treatment faster, simpler, and more affordable, Sentinel applies innovative technologies (including patent-pending filtration systems) alongside flexible financing models (rent, lease, purchase) to help clients meet evolving regulatory demands without compromising on performance.