• For well water or other problematic water, I recommend Big Berkey drip filters. These filters use a combination of ceramic and carbon block filtration. Overall, they are the least expensive type of filters to maintain.
• If you are only interest in a pitcher filter — this BWT filter will remove most contaminants
• If you are able to spend $1500 to $3000, “whole house” filters are the an inexpensive long terms option. These filters are installed at the pipe where the municipal water pipes enters your home. I recommend the whole house filter by Pure Effect.

The Contaminants You Want To Remove

Typically, you want to remove these contaminants from your water:

• Toxic metals (Lead, Mercury, Aluminium, Cadmium, Chromium, Copper, etc.)
• Additives (Chlorine, Chloramines, Fluoride)
• Chlorination By-Products (Trihalomethanes or THMs)
• VOCs and other Organic Compounds (Pesticides, Herbicides, Pharmaceuticals, Fuels)
• Bacteria and viruses (Giardia, Cryptosporidium, etc.)
• Radioactive substances (Radon and Uranium, etc.)

If you use municipal water, you will usually find these contaminants:

• Chlorine
• Chloramines
• Fluoride
• THMs (Trihalomethanes)
• VOCs (volatile organic compounds)

If you use well water, these are the most common contaminants you’ll find:

• Particulate matter (dirt, bits of leaves, etc.)
• Bacteria and viruses
• VOCs (volatile organic compounds)
• Radioactive substances

The Effectiveness Of Different Types Of Water Filters

Pitcher Filters

Pitcher-style filters such as Brita filters are inexpensive units, making them very popular with consumers. However, in the long term, they are actually one of the most expensive option. The filters cartridges require frequent replacement — the cost for 40 gallons is $7-10 each, or $130-$190 for 750 gallons.

Almost all pitcher-style filters use GAC or “granulated activated carbon” as the filtration medium. Typically, GAC is coconut husks that have been heated to a high temperature in the absence of oxygen and then granulated. These filters do remove some chlorine and hydrogen sulfide (rotten eggs odor) — but are not effective at removing VOCs, metals, pesticides or fluoride. Overall, they are not very effective water filters.

Faucet Filters

Filters that attach to your kitchen faucet are very similar to Pitcher Filters, but they do filter a little better than the pitcher-style filters. However, they have the same drawbacks — they are expensive to maintain and they do not remove many contaminants. You must replace filters every 100 gallons at $20-$40 each or $140-$180 for 700 gallons.

Colin Ingram, author of the The Drinking Water Book rates all faucet filters no higher than “Acceptable”.

Gravity-Fed Drip Filters

In my opinion, the best water filters are gravity-fed drip water filters. These filters are excellent at removing chlorine, chlorination by-products, fluoride, VOCs, pesticides, particulates and pharmaceuticals. These filters use “candle” type filters, which are widely available and can be customized to your specific filtration needs.

Gravity-fed filters require no electricity to operate — water is filtered as it drips from the upper chamber to the lower chamber. Because the water is filtered slowly, the filtration is much more effective than a faucet-mounted filter. Generally, slow filtration methods tend to be best.

Berkey is best-known drip filter manufacturer. They make good quality filters. You might also consider ProPur filters. Their latest filter, the ProOne G 2.0, will remove fluoride — including hydrofluorosilicic acid (few filters remove this contaminant).

These filters use carbon block filtration, which works by the process of adsorption (different than absorption). In this process, the carbon attracts certain contaminants at the molecular level, and the contaminants become attached to the surface of the carbon. Once the surface of the carbon is full, the filter must be thrown out and replaced. However, the ProPur filters can be periodically scrubbed, and thus reused for years.

These filter are certified to NSF/ANSI standards #42 (test for chlorine, taste, odor and particulates), NSF Standard #53 (tests for Cryptosporidium, Giardia, lead, VOCs and MTBE) and NSF Standard #61 (tests that toxins aren’t leached into water). They are manufactured in England.

Berkey filter are available from Amazon for about $300.

Overall Rating: Excellent

Reverse Osmosis Filters

Reverse Osmosis filters use a membrane which removes many contaminants from water. They are usually paired with a Granulated Activated Charcoal filter to remove chlorine. Most reverse osmosis filters are installed under the sink and have a holding tank. The semipermeable membrane separates many contaminates (which usually have a larger particle size that water) from the water and rejects a large amount of water in the process. The result is a waste of several gallons of water for every gallon filtered and many naturally occurring minerals (including calcium and magnesium) are also removed from the water.

However, they are quite effective filters, in terms of removing contaminants. However, they do not reduce VOCs or pesticides (unless a Carbon Block filter is included). They can take up to an hour to filter one gallon of water and the filters need to be replaced regularly.

If you want to go this route, I recommend the iSpring Reverse Osmosis System, which is quite reliable.

Overall Rating: Very Good

Countertop Distillers

Countertop distillers are effective water purifiers, but they take some time to distill water (for example 5 hours to distill 1 gallon). They also require electricity to run, and they give off some heat and the integrated fans make some noise. Also, most distillers do not remove VOCs (like benzene) because they have a lower boiling point that water. So they will vaporize together with the stream, resulting in a contaminated distillate.

Countertop distiller that get a rating of “Excellent” from Colin Ingram in the The Drinking Water Book are: Megahome Countertop Distiller, Waterwise 4000 and Waterwise 8800, Kenmore 34480 and Pure Water Mini-Classic.

Megahome Countertop Water Distiller

This distiller is sold under many brand names — it’s the most widely distributed distiller in the world. It has many quality components despite being inexpensive. It produces 1 gallon of water in 5 hours. The water is passed through a small granular carbon filter. There’s a sealed connections from the distiller to the water collection container, so there is minimal risk of contamination by air. The unit has a stainless steel boiling chamber that is easily accessible for cleaning.

The Megahome Countertop Distiller is available from Amazon for about $150.

Waterwise 4000 Countertop Distiller

This is a more powerful version of the distiller listed above. It has the same features but produces 1 gallon of distilled water in 4 hours. Also received an “Excellent” rating from Colin Ingram in the The Drinking Water Book.

The Waterwise 4000 is available from Amazon for about $320.

Overall Rating: Excellent

The post The Best Water Filters appeared first on Reactual.

If you want to remove both chloramines and chlorine from your shower, I recommend a vitamin-C based shower filter, like the Sonaki In-Line Filter

This combination filter is also available — it incorporates a sediment filter and a Vitamin C filter into one unit.

The Details

Almost all popular shower filters available today only remove 20% – 80% of free chlorine (not total combined chlorine) from your shower. This includes shower filters that are certified by the NSF #177 Standard — unfortunately this standard only indicates that a filter will remove 50% of free chlorine in the water.

Also, many cities now treat water with chloramines instead of chlorine. There are no conventional shower filters that will remove more than a small amount of chloramines from your shower. The only way to remove chloramines is to use a Vitamin-C based shower filter which are only made in Korea and Japan.

Why Filter Your Shower?

Because your skin absorbs substances while showering. Typically, 60% of the chlorine that most people absorb daily comes from showering in chlorinated water. Chlorine damages your hair and skin.

Shower water also contains things like heavy metals and VOCs (volatile organic compounds). Ideally, all these things should all be filtered out, but filtering water at the showerhead is problematic, because the water is typically hot and under high pressure, making filtration difficult. Carbon filters, which are normally excellent at remove chlorine, cannot handle the volume and heat of shower water.

Because of these problems, most shower filter makers rely on a metallic medium called KDF. Shower filter vendors typically show impressive charts to demonstrate long-term removal of chlorine. However, if you read the tests carefully, you’ll see that they apply to “free chorine” (chlorine that has not combined with other constituents in water), and the reality is that KDF-filters have little effect on “total chlorine” (combined chlorine). In fact, chlorine is often added at the water plant as a blend with ammonia called “chloramine.” KDF is not effective at removing chloramine or combined chlorine.

Here are the details on my recommended shower filters:

Vitamin C Shower Filters

Vitamin C shower filters are very effective in removing chlorine and chloramines from shower water. Chloramine or NH₂Cl  (a combination of chlorine and ammonia) is now commonly being used in place of chlorine for disinfection, but chloramines are not easily removed from water. Carbon filters are virtually useless in showers, because they do not work when the water is warm, and they also get clogged fairly quickly. KDF filters also don’t perform well in hot water, and they don’t remove chloramines. However, Vitamin C filters can remove chloramines effectively from water. To back this up, the San Francisco Public Utilities Commission now states on their website that only Vitamin C can be used to remove chlormaines from municipal water. Here is the quote from the Commission:

Vitamin C (ascorbic acid) has recently been included in AWWA Standard (AWWA, 2005b) as one of the methods for dechlorination of disinfected water mains. SFPUC and other utilities have used Vitamin C for dechlorination prior to environmental discharges of chlorinated and chloraminated water. Since ascorbic acid is weakly acidic, the pH of water may decrease slightly (Tikkanen et al., 2001). Ascorbic acid has been used for a long time as one of the dechlorinating agents for preservation of chlorinated or chloraminated water samples for laboratory analysis.

The full document can be found here.

Vitamin C filters are simple in design — they contain a solid block of Vitamin C (ascorbic acid), and water runs through the filter and comes into contact with the Vitamin C. The Vitamin C neutralizes about 99% of the chlorine and chloramines in the water, and their effectiveness does not diminish until the Vitamin C is completely used up.

My recommendation for a Vitamin C showerhead is the Sonaki In-Line Filter

The filters last about 2-4 months before they need replacing, depending on how many showers you take. The filter is transparent, so you can see when the Vitamin C has run out.

Refills for the Sonaki filters are priced at $37 for 5 filters.

Sprite HOB-CM Brass Shower Filter

If you are just interested in removing free chlorine and sediment from your water, my recommendation is to use a Sprite Shower Filter. This filter is NSF Certified to standard #177 for shower filtration. It removes most free chlorine and some combined chlorine, sediment, hydrogen sulfide, iron oxide. Besides the fact that it does not remove chloramines, this is pretty good filter, and it is constructed with brass instead of the usual plastic.

The filter comes with a one year warranty, it is rated to filter 20,000 gallons or last 12 months, which ever comes first. It should be flipped half-way through the year. If the O-ring on the filter breaks, Sprite will replace it for free.

You can get the Sprite Shower Filter on Amazon for around $48.

See also my review of low-flow shower heads — these shower heads can be used in conjunction with these filters.

The post The Best Shower Filter appeared first on Reactual.

The Details

Typically, 60% of the chlorine that most people absorb daily comes from showering or bathing in chlorinated water. Chlorine damages your hair and skin. Bath water also contains things like heavy metals and VOCs (volitive organic compounds). Ideally, all these things should all be filtered out.

Vitamin C Tablets or Powder

Vitamin C tablets or Vitamin C powder will remove 99% of free chlorine and 99% of chloramines from bath water. Chloramine or NH₂Cl (a combination of chlorine and ammonia) is now commonly being used in place of chlorine for disinfection, but chloramine is not easily removed from water. However, Vitamin C can neutralize 99% of the chloramines from water. To back this up, the San Francisco Public Utilities Commission now states on their website that only Vitamin C can be used to remove chlormaines from municipal water. Here is the quote from the Commission:

Vitamin C (ascorbic acid) has recently been included in AWWA Standard (AWWA, 2005b) as one of the methods for dechlorination of disinfected water mains. SFPUC and other utilities have used Vitamin C for dechlorination prior to environmental discharges of chlorinated and chloraminated water. Since ascorbic acid is weakly acidic, the pH of water may decrease slightly (Tikkanen et al., 2001). Ascorbic acid has been used for a long time as one of the dechlorinating agents for preservation of chlorinated or chloraminated water samples for laboratory analysis.

The full document can be found here.

Vitamin C tablets are slight more convenient since the some in measured amounts (tablets) and they also “fizz” to release the Vitamin C. However, Vitamin C powder is quite a bit less expensive overall.

One More Option

The post The Best Bath Filters appeared first on Reactual.