Test results
Filter test results and certification
What the Puure Nano filter reduces, measured by an independent ISO/IEC 17025 accredited lab. Every report can be downloaded.
Measurlabs reports 25146 (7 August 2026) and 30494 (31 August 2026) · Updated 14 October 2026
99.9%
lead and mercury
20
PFAS tested: none detected after filtration
99.9%
of fluoride removed, not detected after filtration
Lab-tested Puure Nano filter, ISO/IEC 17025 accredited lab (Measurlabs report 25146, 7 August 2026). Fluoride: dedicated test, report 30494, July 2026.
Results by substance
Measured on the Puure Nano filter (report 25146) and, for fluoride, on a Puure filter (dedicated test). Results can differ with your water.
Swipe sideways to see the whole table
| Substance | Result after filtration |
|---|---|
| PFAS“Forever chemicals” | 20 PFAS tested, each added at 0.05 µg/L: none detected after filtration |
| LeadHeavy metal, old pipes | 99.9% |
| MercuryHeavy metal | 99.9% |
| ArsenicHeavy metal | 98% |
| Copper, zinc, cadmium, chromium, uraniumOther metals | 99% |
| MicroplasticsPlastic particles | 112 particles before filtration, no microplastic particles detected after |
| Pesticides157 tested | All below the quantification limit after filtration (including atrazine, simazine, diuron, imidacloprid, metolachlor and glyphosate) |
| Pharmaceuticals24 tested | Most below the detection limit after filtration. Metformin reduced by about 96%, sulfamethoxazole by about 99% |
| Bisphenols5 tested | All below 0.047 µg/L after filtration |
| PAHsCombustion by-products | 98%+, all below the detection limit after filtration |
| Free chlorineTaste and smell | 0.24 mg/L in, below 0.05 mg/L out (below detectable levels) |
| FluorideDedicated lab test, July 2026 | 99.9% removed: not detected after filtration |
| Calcium and magnesiumUseful minerals | Pass through: no demineralisation, no reverse osmosis |
Lab-tested Puure Nano filter, ISO/IEC 17025 accredited lab (Measurlabs report 25146, 7 August 2026). Fluoride: dedicated test, report 30494, July 2026. Accredited methods: PFAS, PAHs, pesticides and metals. Microplastics, pharmaceuticals, bisphenols, free chlorine and fluoride were measured by the same lab with non-accredited methods.
What is certified
The Puure® replacement filter is Tested and Certified by NSF International against NSF/ANSI Standard 42 for material requirements only.
Certificate C0896669 · Download (PDF)
What has not been tested
Bacteria and viruses: not tested, so we make no claim.
Which filter
The results on this page were measured on the Nano filter for the Tap System. They do not apply to the shower filter.
Every document
NSF certificate
NSF International · NSF/ANSI Standard 42 · PDF
Lab report 25146
Measurlabs, ISO/IEC 17025 · Nano filter · 7 August 2026 · PDF
Lab report 30494
Measurlabs · Fluoride, tested July 2026 · 31 August 2026 · PDF
Lead-free compliance
Puure® 3.0 Tap System · PDF
REACH compliance
Puure® 3.0 Tap System · PDF
How the lab tests the filter
The lab adds a known amount of each substance to pure water, runs it through a new Puure Nano filter at up to 2.4 bar, then measures what comes out. We publish the full reports.
