Every reading, first gallon to last. Reduction holds high through the filter's rated life, and we show you the decline the industry never shows - down toward the 50% mark their standard still calls "working".
| 300 gal | 91% |
|---|---|
| 600 gal | 92% |
| 900 gal | 91% |
| 1200 gal | 90% |
| 1500 gal | 91% |
| 1700 gal | 90% |
| 2100 gal - rated life ends | 84% |
| 2650 gal | 69% |
Estimated chlorine reaching your skin, gallon by gallon. We retire the filter before output crosses the 0.5 mg/L level research links to skin-barrier effects in sensitive skin, not when it flunks the industry test.
| 300 gal | 0.20 mg/L |
|---|---|
| 600 gal | 0.18 mg/L |
| 900 gal | 0.20 mg/L |
| 1200 gal | 0.22 mg/L |
| 1500 gal | 0.20 mg/L |
| 1700 gal | 0.22 mg/L |
| 2100 gal - rated life ends | 0.35 mg/L |
| 2650 gal | 0.68 mg/L |
A filter holds a fixed amount of chemical-fighting media. Two people run twice as much water through it. Same filter, half the calendar.
An 8-minute shower runs about 20 gallons through your filter. A second person doubles it. Both cadences deliver the same water volume per filter, the calendar is the only thing that changes.
Two people on a blanket 90-day plan spend the filter's capacity weeks before the replacement arrives. That's why we ask who uses the shower, and why the industry's one-date-for-everyone schedule exists for billing convenience, not water science.
Chlorine is the tested, quantified story above. The same media bed is also designed to reduce levels of:
And this is where your cadence matters most: reduction media works on capacity, and a fresher filter has more of it. Replacing your filter on the right cadence supports lower levels of everything the media touches, not just chlorine.
Reduction percentages are measured: a blended aggregate of all full-life chlorine tests we have conducted on the current filter, to the gallon, by two different labs, against 2x-7x typical tap water chlorine. The mg/L figures are not separate measurements. They are calculated from those same reduction percentages against a 2.2 mg/L inlet concentration, and will scale with the chlorine level of your own water.
Independently Tested,
Backed by Real Data
We know that tap water contamination is a major concern for Americans. That's why we've meticulously engineered our system and filtration technology to dramatically reduce your exposure to harmful contaminants like chlorine, PFAS, and microplastics.
Most water municipalities don't remove harmful compounds from your tap water.
Your body can filter them out, but "at the cost of cellular damage" [Gary Brecka].
The easiest way to protect your skin, hair, and overall health is to filter the toxins before they enter your body.
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Study: "Effects of cold-water immersion on health and wellbeing: A systematic review and meta-analysis" (Cain et al., 2025)
Why It's Impressive: Systematic reviews and meta-analyses are the gold standard for evidence, as they compile and analyze data from many individual studies. This specific review focused on the effects of CWI in the general population.
Key Findings: It found a significant reduction in stress observed 12 hours post CWI. It provided evidence for longer-term benefits in a narrative synthesis, including a 29% reduction in sickness absence among participants who took cold showers. It confirmed CWI's effects on sleep quality and quality of life, suggesting significant applications for general wellbeing and stress management.
Study: Short-Term Head-Out Whole-Body Cold-Water Immersion Facilities Positive Affect and Increases Interaction between Large-Scale Brain Networks" (Yankouskaya et al., 2023)
Why It's Impressive: This study used fMRI (functional Magnetic Resonance Imaging) to look directly at the brain, moving beyond self-reported feelings to show a neurological basis for the "mood boost" from cold plunging.
Key Findings: Participants felt more active, alert, attentive, proud, and inspired after a cold-water bath. The changes in positive emotions were associated with increased coupling (interaction) between brain areas involved in attention control, emotion, and self-regulation. This indicated that CWI may have a profound, integrative effect on key brain functions responsible for mood and focus.
Study: "Cold plunges actually change your cells" (Reporting on a study from the University of Ottawa's HEPRU lab, 2025)
Why It's Impressive: This research goes to the cellular level, suggesting a fundamental biological adaptation rather than just a superficial or temporary effect.
Key Findings: Repeated cold-water immersion for seven consecutive days improved autophagic function (the cell's recycling system). This enhancement allows cells to better manage stress and increases cellular resilience. The authors suggest this could have significant implications for health, longevity, and potentially preventing diseases at a microscopic level.
While we haven't conducted accredited 3rd party testing for all of these specific contaminants yet, we have conducted preliminary in-house testing that shows a significant reduction in PFA's (including compounds like PFOA/PFOS), Heavy Metals (such as Lead and Copper), and other harmful chemicals commonly found in tap water. Our partner, Human Biologist Gary Brecka, advocates for minimizing all toxin exposure, and our commitment is to provide a comprehensive filtration solution. The filter testing data video on this page, featuring Gary, details the efficacy of our core filtration media against key contaminants, demonstrating a powerful reduction in the overall chemical load of your shower water. We are actively pursuing further accredited testing to validate these preliminary results.
Over time, all filter media becomes saturated, reducing its ability to capture new contaminants. How fast it saturates depends on how much water runs through it: one person showering daily, about 90 days; two or more people, about 45. Sticking to the cadence that fits your shower ensures you continue to enjoy cleaner, less chemically-loaded water for your skin, hair, and respiratory health.
Our filtered shower head is engineered for increasing you water pressure. We've designed the filtration system to deliver high flow with maximum contact time for the filtration media, ensuring contaminant reduction without sacrificing your showering experience.
