“Reverse osmosis… on steroids!”Sarah, customer
Filtered.Mineralised.
Countertop reverse osmosis that adds calcium, magnesium and potassium back. Built-in UV-C. No plumbing.
How Osmosis One works
Strip. Restore. Protect.
Strip.
Cartridge 1, 2-in-1: RO membrane + carbon
The RO membrane separates water from dissolved substances, with carbon filtration in the same cartridge.
Restore.
Cartridge 2, 2-in-1: minerals + post-carbon
Calcium, magnesium and potassium go back in, and a final carbon stage polishes the taste.
Protect.
UV-C, the last step
A second barrier after the membrane, for bacteria, viruses and parasites. UV-C treats the water with light.
Illustrations of the processes, not technical cross-sections. Water passes RO + carbon, then the mineral post-filter, then UV-C last. How each method works.
Sixteen results.
None below 94%.
Lead, arsenic, PFAS and coliform bacteria, measured before and after filtration. Published in full, corrections included.
- Total Coliforms5.0×10⁵ → <1 CFU/100 mL>99.99%
- Arsenic0.2980 → <0.0002 mg/L>99.93%
- Lead0.1524 → 0.0003 mg/L99.80%
- Barium11.560 → 0.024 mg/L99.79%
- Chromium0.274 → <0.001 mg/L>99.63%
- Cadmium0.0512 → <0.0002 mg/L>99.60%
- PFOS (PFAS)0.001003 → <0.000004 mg/L>99.60%
- Chlorine2.04 → <0.01 mg/L>99.50%
- PFOA (PFAS)0.000734 → <0.000004 mg/L>99.45%
- Copper2.783 → 0.019 mg/L99.32%
- Perchlorate0.110 → <0.002 mg/L>98.18%
- Selenium0.121 → <0.001 mg/L>97.17%
- Nitrate26.537 → 0.825 mg/L96.89%
- Total Dissolved Solids833 → 27 mg/L96.76%
- Mercury0.0069 → 0.0003 mg/L95.65%†
- Fluoride8.793 → 0.459 mg/L94.78%†
All 16 results as a table
| Substance | Before | After | Unit | Reduction |
|---|---|---|---|---|
| Total Dissolved Solids | 833 | 27 | mg/L | 96.76% |
| Chlorine | 2.04 | <0.01 | mg/L | >99.50% |
| Nitrate | 26.537 | 0.825 | mg/L | 96.89% |
| Fluoride | 8.793 | 0.459 | mg/L | 94.78%† |
| Arsenic | 0.2980 | <0.0002 | mg/L | >99.93% |
| Cadmium | 0.0512 | <0.0002 | mg/L | >99.60% |
| Chromium | 0.274 | <0.001 | mg/L | >99.63% |
| Lead | 0.1524 | 0.0003 | mg/L | 99.80% |
| Mercury | 0.0069 | 0.0003 | mg/L | 95.65%† |
| Copper | 2.783 | 0.019 | mg/L | 99.32% |
| Barium | 11.560 | 0.024 | mg/L | 99.79% |
| Selenium | 0.121 | <0.001 | mg/L | >97.17% |
| PFOS (PFAS) | 0.001003 | <0.000004 | mg/L | >99.60% |
| PFOA (PFAS) | 0.000734 | <0.000004 | mg/L | >99.45% |
| Perchlorate | 0.110 | <0.002 | mg/L | >98.18% |
| Total Coliforms | 5.0×10⁵ | <1 | CFU/100 mL | >99.99% |
Source and how to read the results
Values from Nord Osmosis’s published product data. They are test values, not a guarantee for every source water or operating condition. The original laboratory report has not been independently checked here.
“<” means below the stated measurement limit. “>” marks a minimum reduction: the true value is at least the bar drawn.
† Fluoride (94.78%) and mercury (95.65%) are calculated from the displayed concentrations as (before minus after) ÷ before × 100. Their previously published percentages, 97.79% and 99.80%, did not match those concentrations. All other reductions are reproduced as published.
RO takes everything out.
We put the good back.
A reverse-osmosis membrane cannot tell a contaminant from a mineral. So the last cartridge in Osmosis One adds calcium, magnesium and potassium back, and lifts the pH.
The natural three, restored at the final stage
Drawn live: each mineral as a dissolved ion in water. Tap a tile to stir.
pH after the mineral post-filter
7.5-8.5
Nord’s specification for One Mineral Restore. The exact mineral content and pH depend on your source water and filter age.
Balanced, not aggressive.
Water with almost everything removed is called “aggressive” in water treatment: it readily dissolves what it touches. Adding minerals back gives it balance, and a rounder taste.
Included, not an upgrade.
One Mineral Restore comes with every system. Pull it out and push in a new one about every 90 days. See the cartridge.
RO + carbon is the start.
Not the finish.
Compared with AquaTru Classic in its standard configuration: what comes in the box, and the published specifications.
Full comparison and sources| Feature | Osmosis OneNord | AquaTru ClassicStandard filter |
|---|---|---|
| Mineral-adding post-filter | Included | Optional upgrade |
| Built-in UV-C treatment | Included | Not included |
| Filtered water : wastewater | 3.5 : 1 | 3 : 1 |
Published specifications for AquaTru Classic with its standard VOC filter, not a head-to-head test.
- Reference: AquaTru Classic with the standard VOC carbon filter; its mineral filter is an optional upgrade. Included features and published specifications, not laboratory filtration performance.
- Nord’s published feed tank is 4.5 L. AquaTru’s is 1 US gallon (3.785 L), per its support article. (4.5 ÷ 3.785 − 1) × 100 ≈ 19%.
- Nord’s published 3.5:1 ratio versus 3:1, calculated from AquaTru’s published 75% Classic efficiency. For the same filtered volume, (1 − 3 ÷ 3.5) × 100 ≈ 14% less concentrate. Separately published specifications, not a head-to-head test.
Pour. Return.
It refills.
No installation. No plumber. No landlord call. Plug it in, fill the tank, pour. Set the pitcher back and it refills by itself.
Fill the 4.5 L feed tank.
The removable rear tank holds tap water before filtration.
Serve from the pitcher.
Filtered water collects in a separate, removable pitcher. Take it to the table or chill it in the fridge.
A tank you can actually clean.
Sealed tanks are hard to reach inside. The 4.5 L feed tank lifts out, so you can wash it properly. Empty the remaining concentrate before refilling.
Two cartridges.
Both 2-in-1.
No tools to change either. The display tells you when: white when all is well, flashing red when a change is coming, solid red when it is time.
Filter life depends on your water and daily use. Flush new cartridges and reset the indicator as the manual describes. Looking for One Carbon Final? It is a carbon-only post-filter; check your cartridge reference before switching.
Gothenburg.
Engineered on decades of water science, by a Swedish team with long experience in water purification. The same company as Nord Hydrogen: Finesse Healthtech AB.
