Black Berkey®: High Performance Filtration Against All Contaminants
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Black Berkey® Filter Test Analysis
1. Extent of Tests Carried Out
Filters Black Berkey® have undergone extensive testing on a broad spectrum of contaminants, carried out by certified laboratories.
- Heavy metals: Proven reduction >99% on Arsenic, Lead, Mercury, Aluminum, etc.
- PFAS and perfluorinated compounds: >99.9% reduction on PFOA, PFOS, PFNA, etc.
- Microbiological pathogens: >99.9999% reduction of bacteria and >99.997% of viruses.
- Pests: Cryptosporidium and Giardia eliminated >99.994%.
- Pesticides and herbicides: >99.9% reduction on over 75 chemical compounds.
- Radioactivity: Reduction of 95.3% for Beta emissions and 98.7% for Alpha emissions.
- Uranium: 97% reduction.
2. Analysis Protocol and Tested Volume
The tests were carried out according to the standards EPA, NSF/ANSI 42 & 53, and ISO 17025.
- Radioactivity tests: 50 gallons (~189 liters) tested.
- PFAS testing: 25 gallons (~95 liters) tested.
- Microbiological tests: Extreme conditions simulated, test validated.
- Heavy metals and pesticides tests: Filtration validated on high concentrations.
3. Comparison with other filters
| Criteria | Black Berkey® (Made in the USA, 5 secret filtration media) | Weeplow O'Pure 2 (Made in China) | Coldstream FTO+ (Made in the UK) |
|---|---|---|---|
| Number of contaminants tested | 200+ | ~50 | 50+ |
| Long-term saturation tests | ❌ No (Extrapolation to 22,000 L) | ❌ No (Tests on a few hundred liters) | ✅ Yes (1,500 L / 6 months) |
| Radioactivity tests | ✅ Yes | ❌ No | ❌ No |
| Pathogen and virus testing | ✅ Yes | ✅ Yes (low volume) | ✅ Yes |
| PFAS testing | ✅ Yes | ✅ Yes (without long-term validation) | ✅ Yes |
| Strong scientific validation | ✅ Yes (EPA, NSF, ISO 17025) | ❌ Limited testing | ✅ NSF Standards |
4. Conclusion
THE Black Berkey® offer a exceptional filtration on a broad spectrum of contaminants. However, no tests have been carried out over the entire announced lifespan (22,000 liters). Performance is proven on volumes tested in the laboratory, but longevity is based on extrapolation.
Final verdict: Berkey is one of the most efficient filters on the market, but the announced capacity of 22,000 liters remains an estimate.
Black Berkey filters are made in the USA and contain a secret formula integrating five filtration media. This explains why they are not produced in China, unlike Weeplow filters.
That said, Weeplow carbon filters have good filtering properties. You just need to find out about the advantages of activated carbon in filtration.