The Big Berkey Water Filter System: Uncertified and Inconvenient (2023)

The research

  • Why you should trust us
  • Who this is for
  • How we tested
  • What we found
  • Why it matters
  • What’s inside the Black Berkey filter
  • Footnotes

Why you should trust us

Since 2016, I have overseen our water-filter guides, covering both pitchers and under-sink systems. John Holecek, a former NOAA researcher, has conducted air- and water-quality testing for us since 2014. He prepared the test solutions and contracted the independent lab that Wirecutter commissioned for this guide and for our guide to water pitcher filters. That lab, EnviroMatrix Analytical, is accredited by the California Department of Health Services, and it routinely analyzes drinking water.

Who this is for

The Big Berkey Water Filter System: Uncertified and Inconvenient (1)

Big Berkey filter systems, and similar systems by Alexapure and ProOne (formerly known as Propur), are popular with people who rely on well water, which may contain contaminants that would otherwise be removed by a municipal water plant. Berkey also has a significant following among the disaster-preparedness community and government skeptics.1 And Berkey retailers tout these systems as safety equipment for emergencies, with some estimating they can provide filtered drinking water to as many as 170 people per day.

No matter the reason for your interest in Berkey or any other water-filter systems, we should emphasize that most US municipal water is pretty clean to begin with. No filter can remove pollutants that aren’t there in the first place, so unless you have a known issue, you may not need a filter at all.

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How we tested

Big Berkey’s manufacturer claims that the device removes more than a hundred contaminants (far more than any other gravity-fed filter we have evaluated). Because the filter is not NSF/ANSI–certified—unlike every other filter we recommend in our other guides—we didn’t have a firm basis for comparison with the other filters we have tested in the past. So we decided to conduct independent tests to attempt to reproduce some of these results.

To test these claims, as we do for our filter-pitcher testing, John Holecek prepared so-called challenge solutions and ran them through the Big Berkey system (fitted with the Black Berkey filters). Then he sent samples of the solutions and the filtered water to an independent lab, EnviroMatrix Analytical, accredited by the state of California for analysis. For the Big Berkey testing, he prepared two solutions—one heavily laden with dissolved lead, the other with chloroform. These would provide an indication of the filters’ overall performance on heavy metals and organic compounds.

John prepared challenge samples to match or exceed the contaminant concentrations used in NSF/ANSI certification (150 ug/L for lead and 300 ug/L for chloroform). After confirming that the filters were installed and performing correctly, according to Berkey’s dye test (video), he ran a gallon of contaminated solution through the Berkey and discarded the filtrate (the water and whatever else that had passed through the filter). For the contaminated solution measurements, he filtered a total of two additional gallons through the Berkey, taking a control sample from the second gallon and collecting two test samples of the filtrate from it. The control and filtrate samples were then sent to EnviroMatrix Analytical for testing. Because chloroform is highly volatile—it “wants” to evaporate and combine with other compounds present—John mixed the chloroform into the contaminant solution immediately prior to filtering.

At EnviroMatrix Analytical, the chloroform and any other volatile organic compounds (or VOCs) were measured using a gas chromatography-mass spectrometer (GC-MS). The lead was measured using an inductively coupled plasma-mass spectrometry (ICP-MS) device, following EPA method 200.8.

EnviroMatrix Analytical’s results partially contradicted and partially supported New Millennium’s claims. The Black Berkey filters showed poor reduction of chloroform. On the other hand, they performed spectacularly well on lead reduction. (See the full results in the next section.)

We shared our lab’s results with Jaime Young, a chemist and New Jersey–licensed owner/operator of the water analysis lab (then known as Envirotek) commissioned in 2014 by New Millennium Concepts (manufacturer of the Big Berkey system) for its own testing of its Black Berkey filters.2 Young corroborated our findings on both chloroform and lead.

New Millennium has commissioned other tests in the past, including one conducted in 2012 by the County of Los Angeles’ Environmental Toxicology Laboratory of the Department of the Agricultural Commissioner/Weights and Measures; this one does list chloroform (PDF) among the contaminants the Black Berkey removed to the department’s standard (EPA, not NSF/ANSI). Since that 2012 test, toxicology was shifted to the Los Angeles Department of Public Health. We reached out to the DPH, and it confirmed the original report’s legitimacy. But New Millennium describes Young’s test as its “latest round,” and his results are the most recently listed on the Berkey Water Knowledge Base, the separate site New Millennium maintains for listing its test results and answering frequently asked questions.

Wirecutter’s, Young’s, and Los Angeles County’s test protocols are mutually inconsistent. And because none of them conform to the NSF/ANSI standards, we don’t have a standard basis for comparing the results.

Therefore, we are not heavily leaning on our test results in our general take on the Big Berkey system. The Big Berkey has enough ease-of-use and cost issues that we would recommend a mainstream gravity-fed filter pitcher over it to most readers, even if the Berkey does everything New Millennium claims it can do as a filter.

We also cut open a pair of Black Berkey filters to see how they are constructed and to look for evidence that, as Berkey marketing claims, they contain “at least” six different filtering elements. We found that though the Berkey filters are larger and denser than filters from Brita and 3M Filtrete, they appear to share their filtration mechanisms: activated charcoal impregnated with an ion-exchange resin.

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What we found

The Berkey filter system belongs to the broad class of gravity-fed water filters. These simple devices use gravity to draw source water from an upper chamber, through a fine-pored filter; the filtered water is collected in a lower chamber from which it can be dispensed. It’s an effective, widely used method—filter pitchers are a familiar example.

The Berkey filters showed strong performance on lead-contaminated drinking water. In our test they reduced lead levels from 170 ug/L to just 0.12 ug/L, a measurement that far exceeds the NSF/ANSI certification requirement of reducing lead from 150 ug/L to 10 ug/L or less.

But in our test on chloroform, the Black Berkey filters performed poorly, lowering it by just 13% in our test sample, from 150 ug/L to 130 ug/L. NSF/ANSI requires a 95% reduction, from 300 ug/L to 15 ug/L or less. (Our test solution was mixed to the NSF/ANSI standard of 300 ug/L, but chloroform’s volatility means that it rapidly forms new compounds or evaporates—hence the drop to 150 ug/L at the time of the test. But EnviroMatrix Analytical’s tests also captured other volatile organic compounds that chloroform can create, so we are confident that the results are accurate.) Jaime Young, the New Jersey–licensed water analysis engineer who conducted New Millennium Concepts’ most recent round of testing, also got poor performance on chloroform from the Black Berkey filters.

New Millennium Concepts, however, claims—right on the box the filters come in—that the Black Berkey filter reduces chloroform by 99.8%, to “below lab detectable limits.” (That number appears to be based on the testing done by the Los Angeles County lab in 2012. Its test results [PDF] are available at the Berkey Water Knowledge Base, linked to on—but not part of—Berkey’s main site.)

To be abundantly clear: Neither we nor Envirotek nor Los Angeles County reproduced the entire NSF/ANSI Standard 53 protocol, used for gravity-fed filters like the Black Berkey.

For our part, we had our lab run tests after the Black Berkeys had already filtered several gallons of challenge solution prepared to NSF/ANSI concentrations. But NSF/ANSI certification requires that gravity-fed filters pass through twice their rated capacity of challenge solution before testing. In the Black Berkey filter’s case, that would mean 6,000 gallons.

Like us, Jaime Young prepared his test solutions to NSF/ANSI Standard 53, but he did not run the 6,000 gallons of contaminant solution through the filters that the complete Standard 53 protocol would have required of the Black Berkeys. He reported that the filters gave exceptional performance on lead in his test, too, corroborating our own finding. However, he said that they stopped meeting the NSF removal standard after approximately 1,100 gallons of filtering—barely more than a third of the 3,000-gallon lifespan New Millennium claims for the Black Berkey filters.

Los Angeles County followed a separate EPA protocol, which involved passing only single, 2-liter samples of the challenge solutions through the filters. Unlike us or Young, the county found that the Black Berkey filters removed chloroform to its test standard, in its case by greater than 99.8%, to less than 0.5 ug/L from 250 ug/L.

Why it matters

The inconsistency of our test results, compared with the results from the two labs commissioned by Berkey, left us hesitant to recommend this filter, especially when you can find other independently certified options that put all of these open questions to rest.

Overall, our testing experience reinforces our position that we recommend water filters with NSF/ANSI certification, which the Berkey does not have. That’s because NSF/ANSI standards for certification are exceptionally rigorous, and they are also transparent: Anyone can read them on NSF’s site. The independent labs licensed to conduct NSF/ANSI certification tests are themselves strictly accredited. We spoke with a representative from NSF while reporting this guide, and we learned that it would cost well over $1 million to conduct certification testing for all of the substances New Millennium Concepts claims that the Black Berkey filters remove. New Millennium states that it considers NSF certifications unnecessary, and it cites cost as another reason the testing has not been done.

But even leaving actual filtration performance aside, this filter has enough practical concerns for us to easily recommend one of our other water-filter picks before recommending the Big Berkey. For one, the Berkey system is far more expensive to buy and maintain than any of our recommended filters. And unlike our recommended filters, the Berkey is also large and obtrusive. It is designed to sit on the countertop. But because it’s 19 inches tall, it won’t fit under many wall cabinets, which are typically set 18 inches above the countertop. The Berkey is also too tall to fit in most refrigerator configurations. So it’s unlikely that you’ll be keeping water cold in the Berkey (something that is easy to do with our filter pitcher picks). New Millennium Concepts offers a 5-inch stand to make it easier to fit glasses under the Big Berkey’s spigot, but those cost extra and add more height to the already towering contraption.

A Wirecutter writer who owned a Big Berkey in the past sent a note about his experience: “Besides the unit being absurdly large, it’s also somewhat easy to overfill the top reservoir if you forget to empty the bottom tub. Fully filled, the top reservoir is somewhat heavy and unwieldy, and it immediately starts filtering. So you have to lift it up to get clearance for the carbon filters (which are long and delicate) and then place it into the bottom pot all before it starts leaking all over your floor or counter.”

Another Wirecutter editor owned a Big Berkey (with the company’s alternative ceramic filters) but soon stopped using it. “It was a gift from my spouse because I’d seen one at a friend’s house and thought that the water that came out tasted wonderful,” he said. “Living with one was an entirely different matter. The countertop footprint, both horizontally and vertically, was enormous and awkward. And the kitchen sink where we lived at the time was so small that washing it was a cumbersome chore.”

We also see a lot of complaints from owners about algal and bacterial growth and, more generally, slime building up in their Big Berkeys. New Millenium Concepts acknowledges the issue and recommends adding its Berkey Biofilm Drops to the water being filtered. And it’s enough of a problem that many Berkey dealers have a whole page devoted to it.

Many dealers acknowledge that bacterial growth can become an issue, but their frequent claim of this starting after a few years of use wasn’t the case for our editor. “It began after just under one year,” he said. “The water tasted musty and a mildew smell began to form in both the upper and lower chambers. I’d wash it thoroughly, flushing the filters and detaching them to get into all the tiny connection points, and I made sure to even clean inside the spigot. The taste of the water would return to normal for about two or three days before becoming musty again. I ended up putting the Berkey on the curb, which I feel terrible about.”

Thoroughly removing the algae-bacteria slime from Black Berkey filters involves scouring their surfaces with Scotch-Brite, doing the same for the upper and lower tanks, and finally running a bleach solution through the filters. That is a lot of maintenance for something meant to give people peace of mind about their water.

If you are concerned with disaster preparedness and wish to ensure a supply of clean water during an emergency, we recommend the water storage products from our emergency preparedness guide. If you simply want a good filter for your tap water, we recommend that you look for an NSF/ANSI–certified filter, like those in our guides to the best water filter pitchers and the best under-sink water filters.

What’s inside the Black Berkey filter

Most gravity-fed filters employ two different materials to remove contaminants from water. Activated charcoal adsorbs or chemically binds with organic compounds, which include petroleum-based fuels and solvents, many pesticides, and many pharmaceuticals. An ion-exchange resin removes many dissolved metals from water by exchanging toxic heavy metals (like lead, mercury, and cadmium) for lighter, essentially harmless ones (like sodium—a chief component of table salt).

The Big Berkey Water Filter System: Uncertified and Inconvenient (2)

Our picks for pitcher filters (from Brita) and under-sink filters (from 3M Filtrete) are both constructed this way. New Millennium Concepts does not disclose what the Black Berkey filters are made of, but some retailers make claims about their construction, including this one from “Our Black Berkey Purification elements are composed of a proprietary formulation of more than six different media types including high grade coconut shell carbon, all constructed into a very compact matrix containing millions of microscopic pores.” When we cut open a pair of Black Berkey filters, they appeared to be constructed of an activated charcoal block impregnated with an ion-exchange resin. Jaime Young corroborated this observation.

This article was edited by Harry Sawyers.



    The Big Berkey Water Filter System: Uncertified and Inconvenient? ›

    Berkey Water Filters do not have NSF certification for two main reasons. First, the independent lab tests we have, test for far more contaminants than the applicable NSF certifications. Secondly, the fees for NSF certifications are very cost-prohibitive for what is being tested.

    Why are Berkey filters not NSF certified? ›

    Berkey Water Filters do not have NSF certification for two main reasons. First, the independent lab tests we have, test for far more contaminants than the applicable NSF certifications. Secondly, the fees for NSF certifications are very cost-prohibitive for what is being tested.

    Can bacteria grow in Berkey filters? ›

    Berkey filters require unnecessary maintenance

    This cleaning method has the potential to introduce harmful bacteria and hinder the filter's performance. In short, any attempt to clean the filter could actually create an unsanitary environment for your drinking water.

    Why can t you buy a Berkey filter in California? ›

    It is mainly because of the no-lead law, which prohibits the sale of non-tested and non-certified water filters.

    Do Berkey water filters remove forever chemicals? ›

    Do Berkeys remove PFAS? AKA forever chemicals? Yes! 🙏 Berkey Filters remove over 99.9% of PFAS, including PFOA and PFOS. Toxic, man-made chemical compounds that companies started using in the 1940s to make fluoropolymer coatings.

    Do Berkey filters leach aluminum? ›

    Does Berkey leach aluminum? No, Berkey does not add aluminum to the water. Berkeys are meant to filter the water, not further contaminate it. In-fact, Berkey reduces aluminum (up to 99%).

    Does Berkey water filter E coli? ›

    Heavy Metals - Removed to greater than 99.1%. Coliform and e-Coli - Removed to greater than 99.9%.

    Can Berkey water filters get moldy? ›

    If you notice mold in your system, thoroughly clean your system and filters. Scrub the Black Berkey Elements with a 3M Scotch Brite pad or any similarly abrasive sponge. We recommend doing this for about 2-4 minutes under cool running water to remove any buildup from the surface of the filters.

    Do Berkey filters have mold in them? ›

    Mould is never a good thing to find, especially in your Berkey water filter® System. Remove the Black Berkey ® Purification elements and scrub them with an abrasive pad or toothbrush. Reprime the elements to flush out any old water.

    How long can water sit in Berkey? ›

    How long can water stay in my Berkey system before I need to replace it? It is recommended that you replace your Berkey water after three days. For water that is in a cold environment, the water can keep for up to one week.

    Can you drink lake water from a Berkey? ›

    Berkey water filter systems allow you to transform lake water or whatever other water source you have at hand into safe, clean water for drinking, cooking and personal hygiene. The filter life for the Black Berkey elements is so long that you can freely use your Berkey water for all your water needs.

    Is Berkey better than reverse osmosis? ›

    Most test results and comparison sites do recommend Berkey Filters as No1 filter system on the market today so Yes we recommend Berkey filters instead of Reverse osmosis as the Berkey gives you a perfectly clean and pure drinking water without taking any good minerals out.

    What does Berkey not remove? ›

    Berkey removes >95% of nitrites but does not remove nitrates. If you filter water with a Berkey >99.9% of all toxic herbicides and pesticides will be removed. Berkey reduces petroleum pollutants (including crude oil, diesel, gasoline, kerosene, mineral spirits, and refined oil) by more than 99.9%.

    Does Berkey remove salt from water? ›

    Black Berkey® water filters are designed to remove a very large number of pollutants as specified in test results from an independent laboratory. However, they do not remove the mineral salts initially present in the water and preserve them for the benefit of our body.

    Does Berkey remove radiation? ›

    Yes, a Berkey Filter removes or reduces most radioactive substances by more than 98%. According to EWG's Tap Water Database, over a dozen radioactive elements can be detected in American tap water. The most common are beryllium, radon, radium, strontium, tritium and uranium.

    Why is my Berkey filter rusting? ›

    While the Berkey water filter uses a surgical grade 304 stainless steel, the largest single component of this stainless steel is still steel and steel can potentially rust over time. The chromium in stainless steel when exposed to oxygen in the atmosphere forms a thin invisible layer called chromium oxide.

    Do Berkey filters remove parasites? ›

    Parasites are typically found in outdoor water sources such as lakes, streams and pools. Black Berkey® purification elements remove cryptosporidium by over 99.996% and have been tested to reduce Giardia cysts by over 99.994% as confirmed by test results.

    What is the white stuff on Berkey filter? ›

    This process is called flocculation. This is not dangerous and is in no way a symptom of a failure in your system. The white residue is minerals that were already in your water and are now simply visible when they were previously invisible due to their suspension in ionic form.

    Why does my Berkey water taste like tap water? ›

    The most common cause of the initial metallic taste is failure to fully prime the Berkey Fluoride Filters. The granular nature of the fluoride-capturing media in the Berkey PF-2™ filter results in some finer material being present.

    Can Berkey filter rainwater? ›

    The Black Berkey® water filters used in Berkey® purification systems are fully capable of filtering rainwater.

    Do Berkey filters Alkalize water? ›

    All Berkey systems use Black Berkey filters, which will take out the unwanted, acidic substances that decrease water pH, thus increasing pH by 0.5 to 1.0. By doing this, it also serves as an alkaline water filter by increasing alkalinity.

    Can you use vinegar to clean a Berkey? ›

    A natural solution is to use vinegar, pure if the limescale is really stubborn, or with a 50% dilution with water. Simply spray on the areas where the limescale has accumulated, wait a few minutes and then rinse. Caution: Do not spray vinegar on Black Berkey® filters or PF-2 filters.

    Why does my Berkey water smell bad? ›

    This foul odor is either caused by bacteria present in the water or by dissolved hydrogen sulfide. If the foul odor is only given off by hot water, it may be coming from your hot-water cylinder.

    What are the black specks in Berkey water? ›

    They are not bacteria, but rather an effect that sometimes happens with hard (heavily mineralized) water. When water is filtered through your system, the Black Berkey filter elements actually increase the PH (alkalinity) of the water.

    How do you sterilize Berkey filters? ›

    First, empty and disassemble the Black Berkey Filters Purification Elements from the Berkey system. Use a cleaning pad similar to a Scotch Brite Pad or a stiff toothbrush and gently scrub the outside of the Black Berkey Filters under cool running water. Re-prime the filters.

    Do I need to boil water if I have a Berkey? ›

    It is not necessary to boil your water in addition to running it through the Black Berkey® Elements in your Berkey system. Black Berkey Elements remove biological contaminants as well as heavy metals, pharmaceuticals, disinfectants, and other waterborne contaminants.

    Can you drink river water with a Berkey? ›

    The Berkey water purification systems can efficiently purify raw untreated pond, lake and river water. However, always use the cleanest and clearest water possible.

    What do I do with my Berkey when I go on vacation? ›

    If you plan to leave the system unused for a period longer than 5 days such as a trip or vacation, it's best to empty both reservoirs and leave them upside-down in the dish rack to dry. Remove your Black Berkey® Elements and your PF-2 fluoride filters, place them in baggies, and put them in the refrigerator.

    How healthy is Berkey water? ›

    HEALTHY ~ Berkey water filters are preferable to other filtration systems because they remove viruses, harmful pathogenic bacteria, cysts and parasites as well as unhealthy chemical contaminates and impurities while leaving in the essential minerals your body needs.

    How many times to run water through Berkey? ›

    We recommend filling your Berkey system every 2-3 days to keep your filtered water flowing quickly. If you are leaving on a short vacation (over three days away), follow the below steps! 1. Carefully empty and take apart your system, removing the filters from your system.

    Can you put ice cubes in a Berkey? ›

    Berkey Ice Cubes

    Ice melts... and you'll notice immediately when drinking Berkey water with non-Berkey ice - YUCK! Try using a silicone ice tray and filling with Berkey water to avoid the funky fridge ice cube taste. Take it a step further and add fruit for a fun kick of flavor!

    Why is Berkey so expensive? ›

    This is because they're made of stainless steel and other high-quality materials. The filters themselves, the company says, are made of more than six different materials including high-grade coconut shell carbon. In addition, the high cost of independent testing for water purification may add to the price.

    What is better than a Berkey? ›

    While both ProOne and Berkey offer a range of system sizes to choose from, the ProOne filter removes slightly more contaminants than Berkey (275+ vs 203).

    Do Berkey filters remove fluoride? ›

    Berkey Filters allows you to make this decision about your health yourself by reducing the amount of fluoride in your water by up to 97%. The proprietary media inside the filter is a new and improved high yield aluminum oxide especially formulated for the removal of fluoride and arsenic from drinking water.

    What water filter does Tom Brady use? ›

    The benefits of alkaline water are massive, in fact, the Kangen Water system is trusted by many of the world's top athletes including six-time Super Bowl Champion Tom Brady.

    What is the healthiest way to filter water? ›

    It is best to use a point-of-entry filter system (where your water pipe enters your house), or whole-house filter system, for VOCs because they provide safe water for bathing and cleaning, as well as for cooking and drinking. Activated carbon filters can remove some VOCs.

    What is the healthiest water to drink? ›

    Mineral, structured, and pure spring water are some of the healthiest water you can drink because they're clean and contain all the essential minerals your body needs. Filtered water removes contaminants but might also remove essential minerals.

    How long does a Berkey filter last? ›

    How long do Black Berkey filters last? Black Berkey filter elements are designed to be durable and have a long lifespan compared to its competitors. A set of two Black Berkey filters will filter approximately 6,000 gallons of drinking water (3,000 gallons per purification element) before a filter replacement is due.

    How do you clean hard water from Berkey? ›

    In areas with hard water, calcium scale may build up on spigot and chambers after prolonged use. To remove, soak affected part(s) in vinegar or a 50-50% mix of vinegar and water for about 15 minutes.

    Does Berkey remove cysts? ›

    A Berkey water filter will remove cysts and parasites as well as unhealthy chemical contaminants and impurities while retaining the essential minerals the body needs. A Berkey water filter also has the ability to reduce fluoride and arsenic via the PF line of filters.

    Does Berkey remove microplastics? ›

    Good news, Black Berkey® filters allow for the removal of both of these plastics. In addition, thanks to the filtration power that can operate in the 24 to 26 nanometer range, micro-plastics in the form of solid residues are also removed.

    Is Berkey NSF 53 certified? ›

    The Berkey Filter is not NSF-53 certified. The Berkey Filter claims to exceed the requirements of NSF-53, this is not true. Where NSF-53 would've required they run 6,000 gallons of water through the filter and THEN test the water, one of the labs used only ran 2 liters of water through the Berkey before testing.

    Which water filters are NSF 53 certified? ›

    Multipure drinking water systems are certified as NSF/ANSI Standard 53 water filters. This means that the Multipure Aqualuxe, Aquaperform, Aquaversa, and Aquamini systems have been performance tested and verified by NSF International under NSF Standard 53 for the treatment of contaminants of health concern.

    Does Berkey filter out PFOA and PFOS? ›

    The Black Berkey filter cartridges are capable of removing more than 99.9% of PFOS, PFOA and other harmful PFAS.

    Are Berkey water filters BPA free? ›

    Yes! BPA is not present in any Berkey® system or any part of it. No BPA in Black Berkey® filters and no BPA in the Berkey Light® or Sport Berkey® Filter Bottle either.

    Do Berkey filters remove nitrates? ›

    Berkey removes >95% of nitrites but does not remove nitrates. If you filter water with a Berkey >99.9% of all toxic herbicides and pesticides will be removed. Berkey reduces petroleum pollutants (including crude oil, diesel, gasoline, kerosene, mineral spirits, and refined oil) by more than 99.9%.

    Does Berkey remove arsenic from water? ›

    All Berkey water filters fitted with Black Berkey filter elements can remove 99% of arsenic, and when combined with a fluoride and arsenic filter fitted in the lower chamber, will remove 99.9% or more of arsenic.

    Is NSF 53 better than 42? ›

    Standards for Water Filters

    Standard 42 covers aesthetic (taste and odor) claims, while Standard 53 addresses health-related claims. Although both standards cover drinking water filters, the methods of performance testing found in the standards vary.

    Is Brita certified by NSF? ›

    We're Certified

    System tested and certified by the WQA against NSF/ANSI Standards 42 and 53 for the reduction of the claims specified on the Performance Data Sheet.

    Does FDA require NSF certification? ›

    If you manufacture, sell or distribute water treatment or distribution products in North America, your products typically must be certified to NSF-61. FDA is the Food and Drug Administration.

    Do Berkey filters have mold? ›

    Mould is never a good thing to find, especially in your Berkey water filter® System. Remove the Black Berkey ® Purification elements and scrub them with an abrasive pad or toothbrush. Reprime the elements to flush out any old water.

    Does Berkey filter remove estrogen? ›

    They remove a wide range of different contaminants, including steroid estrogens and many estrogenic substances like trihalomethanes.”

    Can Berkey water go bad? ›

    How long can water stay in my Berkey system before I need to replace it? It is recommended that you replace your Berkey water after three days. For water that is in a cold environment, the water can keep for up to one week.


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