Including filter system and high-performance HPC Bacteria filter.
HPC bacteria are a broad mix of naturally occurring microorganisms that can live in water and inside household plumbing. You may also see the term heterotrophic plate count, which refers to the lab method used to estimate overall bacterial growth rather than a single specific germ. In Lois homes, these general bacterial signals can show up as musty smells, slippery residue, or faster biofilm forming on showerheads and faucet screens.
Heterotrophic plate count readings tend to increase when water stands in pipes, when sediment or organic material feeds microbes, or when plumbing allows biofilm to develop. Along with subtle taste or odor changes, elevated heterotrophic plate count can indicate that the household water system needs attention. Taking a whole-house view—treating the water as it enters a Lois residence—helps limit conditions that allow regrowth further down the plumbing.
The most effective single filter-style option for reducing HPC bacteria throughout a home is a whole-house ultraviolet (UV) disinfection system. UV inactivates microorganisms as water flows through a stainless chamber illuminated by a UV lamp, treating water in real time without chemicals and without altering taste. When installed at the main inlet for a Lois house, a UV system protects every tap, shower, and appliance against heterotrophic plate count concerns.
For UV to perform reliably it needs clear water so the light can reach microbes; heavy sediment, iron, or cloudiness can reduce effectiveness. That’s why whole-house UV setups are often paired with prefiltration, while the UV stage remains the core technology targeting HPC bacteria. Proper sizing to your home’s flow rate and routine lamp and sleeve servicing keep the system working as intended—Mr. Pure Water can help Lois homeowners select and install a whole-house UV system matched to their plumbing.