Including filter system and high-performance Legionella filter.
Legionella is a naturally occurring bacterium that can show up in plumbing when conditions let it multiply. The species most often mentioned is Legionella pneumophila, which can colonize water heaters, storage tanks, plumbing dead-legs, and low‑flow pipe sections. It becomes a particular concern when water is aerosolized in showers, faucets, or certain appliances, since people can breathe in contaminated droplets. Because you usually can’t taste, smell, or see this organism, testing and preventative steps are important for Postil homeowners who want peace of mind.
Even if your municipal supply is treated, Legionella can regrow inside a house when temperatures, stagnation, scale and biofilm create favorable conditions. Warm water ranges, intermittent fixture use, and sediment build-up all help bacteria persist in plumbing. While many homeowners focus on drinking-water quality, the greater exposure risk often comes from mist and spray during everyday use. Controlling water at the point it enters Postil homes can be a key part of reducing that risk.
If you prefer a single whole-house solution, a true barrier filter designed for microbial reduction—such as a whole-house ultrafiltration system—is the most effective physical option for removing Legionella. Ultrafiltration uses a fine membrane to strain out bacteria-sized particles rather than relying on adsorption, making it well suited to reduce organisms like Legionella pneumophila before water reaches showers and other fixtures. Installed on the main service line, it treats water used throughout a Postil residence instead of treating only one tap.
A whole-house ultrafiltration unit should be sized for your home and typically paired with a prefilter to trap larger sediment so the membrane can operate reliably and last longer. Regular maintenance is required to prevent fouling and preserve flow rates, and addressing in-home factors—water heater temperature, dead-end piping, and routine fixture use—also helps control Legionella. Mr. Pure Water can evaluate Postil homes and recommend a whole-house ultrafiltration setup that fits your house and supports a broader Legionella prevention plan.