Including filter system and high-performance PFUnA filter.
PFUnA is one of the PFAS compounds homeowners hear about when researching persistent, hard-to-treat contaminants in drinking water. It can get into water supplies through industrial uses and the breakdown of related fluorinated chemicals, and it does not break down quickly. In Havana many residents first learn about PFUnA from utility advisories, local reporting, or private well testing, and that concern usually leads people to focus on treatment options designed specifically to reduce PFAS.
Because PFUnA typically appears at very low concentrations, you usually won't detect it by sight, smell, or taste — even in Havana tap water. That makes testing the only reliable way to know whether it's present. PFAS such as PFUnA behave differently than familiar issues like chlorine taste, sediment, or mineral hardness, so simple cartridge filters often aren’t sufficient; a whole-house system can be a sensible choice to lower exposure during drinking, cooking, showering, and other daily uses.
For whole-house reduction of PFUnA, the most effective single-filter residential option is a high-quality granular activated carbon (GAC) system. GAC media offers a very large surface area that adsorbs many organic contaminants, including a range of PFAS. For PFUnA specifically, performance hinges on using the appropriate carbon type, allowing enough contact time, and maintaining moderate flow rates — which is why a correctly sized whole-house carbon tank is generally preferable to a small, fast-flow cartridge.
Mr. Pure Water typically installs whole-house GAC systems at the main water entry so treated water reaches every tap in Havana homes and to appliances throughout the house. Systems are chosen to match household water use to prevent short contact times that can reduce PFAS removal. Like all adsorption media, carbon must be serviced and replaced on schedule as it becomes loaded; if you have recent test results, we can use them to size and configure the GAC system to better address PFUnA for your household.