Including filter system and high-performance HPC Bacteria filter.
HPC bacteria are a broad mix of naturally occurring microorganisms that can show up in water and inside plumbing. You may also encounter the term heterotrophic plate count, which refers to a laboratory method used to estimate overall bacterial growth rather than a single pathogen. High counts often point to conditions that let bacteria multiply — for example, homeowners might notice musty smells, slimy buildup, or faster biofilm formation on faucets and showerheads in Portland houses.
Heterotrophic plate count readings can increase when water sits in pipes, when sediment or organic material provides food, or when plumbing allows biofilm to develop. These changes can coincide with altered taste or odor, and while many heterotrophic bacteria aren’t known to cause disease, elevated HPC bacteria suggest your water system could use attention. A whole-house approach installed where water enters your Portland home addresses the incoming water and helps limit regrowth further down the plumbing.
A whole-house ultraviolet (UV) disinfection system is usually the single most effective filter-style option for reducing HPC bacteria throughout a residence. UV inactivates microorganisms as water flows through a stainless chamber and is exposed to a UV lamp, providing real-time treatment without chemicals or detectable taste changes. Placed at the main water entry to a Portland home, UV protection treats every tap, shower, and appliance.
For UV to perform reliably, the water feeding the unit must be clear enough for light to penetrate, since heavy sediment, iron, or cloudiness can shield microbes. That’s why whole-house systems often use prefiltration upstream of the UV stage, which remains the core technology targeting microorganisms like HPC bacteria. Proper sizing to your home’s flow rate and routine lamp and sleeve maintenance keep the system effective — Mr. Pure Water in Portland can help select and install a whole-house UV system matched to your plumbing so heterotrophic plate count is better controlled.