Including filter system and high-performance PFHxS filter.
PFHxS is one of the PFAS family of chemicals often called “forever chemicals” because they don’t break down easily in the environment. In Marathon you won’t be able to see, smell, or taste PFHxS in your tap water, so it usually only comes to light through testing or water quality reports. For homeowners on island properties—whether on a municipal connection or a private well or cistern—installing point-of-entry treatment is a practical way to take control of what enters the whole house.
PFHxS has been linked to industrial uses and legacy PFAS-containing products, so it can be present at low levels in water supplies and isn’t reliably removed by basic filters. Simple pitcher filters or sediment cartridges can help with particulates common in coastal or well systems, but they’re not designed to reduce dissolved PFAS compounds. Many Marathon homeowners prefer a solution that treats all household water—drinking, cooking, bathing, and laundry—rather than relying on a single treated faucet.
The most commonly recommended single filter for PFHxS is a whole-house activated carbon system using high-capacity granular activated carbon (GAC). Activated carbon’s porous media can adsorb many organic contaminants, including certain PFAS, and in a whole-house installation you get more consistent treatment across every tap. For island homes in Marathon, proper contact time between water and GAC is important so the PFHxS has an opportunity to bind before the water moves on through your plumbing.
At Mr. Pure Water we size whole-house GAC systems for real-world use—accounting for flow rates, bed depth, and media volume—so your system performs well even with moderate water hardness and coastal conditions. That matters for Marathon properties where salt air and storm exposure can affect plumbing and where many homes use municipal or local well/cistern supplies. We’ll match a properly sized GAC tank to your household demand so you get steady filtration at every tap without losing pressure.