Category Archives: Filtration

How does your state rank for water-system violations?

Water-contamination-chart

I found this great article and graphic today over at Mother Nature Network. If you click on the picture above it will take you to the interactive version on their site where you can scroll over your state and see how it ranks for water-system violations.

Looking at the graphic it seems the good news is that most of the water that we get from water treatment plants and public water utilities is safe. The bad news is that there are still many Americans whose drinking water does not meet safety guidelines. To further muddy the waters, so to speak, there are currently only 91 chemicals covered under the safe water act. There are thousands of other chemicals that are still unregulated and many of these are on the EPA watch list as potentially dangerous to humans. So your water is only tested for 91 chemicals out of thousands that have been found in drinking water.

So while tap water is generally safe for most people living in the United States I would definitely recommend knowing what is in your water. The use of a home water filter can make a big difference in the taste and quality of your water. Even safe water can often have small particles that have not been removed and is usually treated with chlorine which many people find gives the water a poor taste. A basic carbon filter will reduce the chlorine content and catch much of the sediment and other particles to help you get the best taste from your tap water.

Your link to safer water

I have talked in great detail about the various contaminants that end up in bottled water and the tap water that comes from your local water utility. The best way to reduce your exposure to impurities in your water is by using a home water filter system. Many homeowners already have a water filter system for their refrigerator’s ice and water dispenser. A refrigerator water filter is the easiest way to filter water and should be replaced about every 6 months to maintain optimal filtration. If you do not have a filter system in place already, a great place to start is by finding out what is in your water.

The Environmental Working Group has compiled reports from water utilities across the country to give you easy access to your water quality report. Once you know what contaminants are present in your water you can make a better decision about what type of water filter to use in your home. I have attached my own water report as an example. As you can see the water is tested regularly and certain chemicals are consistently tested higher than health guidelines, but are not considered to be over the legal limit. So my water utility is not breaking the law, but my water is still unsafe to drink.

Because of this I do not drink any water from the tap in my apartment unless it has been filtered first. I use a Brita faucet filter that was easily attached to the kitchen sink to filter water for drinks and cooking. It works great and took about 5 minutes to set up.

Raleigh water report

There are many ways to filter the water that enters your home and reduce the contaminants in it. Whatever kind of water filter you choose just make sure that it has been certified by the NSF, an independent organization that tests filters to make sure their filtration claims are accurate. Once you have a water filter that reduces impurities in your water you will probably notice that it tastes better too! A sweet bonus.

Getting down and dirty with bottled water

Bottledwater-trash-small

In the United States it is estimated that only 10% of plastic bottles are recycled. Meanwhile the bottled water industry has grown into an $8 billion dollar behemoth by selling us something we already have access to, drinking water.

You might think that this would have caused some public uproar by now, after all, the evidence points to a bit of foul play on the part of many companies that sell bottled water. Bottled water has become the wolf in sheep’s clothing purporting itself to be a helpful part of a healthy lifestyle. Pepsi famously created this 60 second add spot to promote their Aquafina brand in which drinking bottled water fills an entire bar with physical health and good feelings. It is true that drinking water is good for your body, but what is not true is the implication that bottled water is any better for you than tap water. Studies have shown that there is no guarantee that bottled water is any safer than tap water. Yet the marketing engines of corporations like Coke and Pepsi have made bottled water synonymous with purity and safety. The end result is that people now believe that tap water is unsafe or impure.

What is even more disturbing is that 40% of bottled water is taken from municipal water sources. Sometimes this water is filtered before being put in bottles, but many companies simply bottle tap water and sell it back to the same community.

And that is just the tip of the iceberg. Nearly every aspect of the bottled water industry has a negative impact on the environment. The softer plastics that make up the majority of bottled water are made from the raw material PET, which comes from petrochemical plants that pollute local groundwater and air supplies.

Not all bottled water comes from municipal sources. Some companies like to hype up the source of their natural spring water to convince us that it is pure and refreshing just the way nature intended it. The problem is that nature did not intend for spring water to be harvested from local groundwater supplies and shipped all over world. This method of water re-distribution has a harmful effect on the local ecology. The Fiji brand of bottled water claims to be bottled at the source, which means if you buy it off your local grocery store shelf it most likely had to travel hundreds or even thousands of miles to get there. Does Fiji water really taste that much better than tap water?

The EPA regulates public water utilities to verify the water that comes from your tap is safe to drink. These regulations are much more strict than the regulation of bottled water performed by the FDA. A common complaint is that tap water has an unusual taste or odor and that it is better to buy bottled water, which presumably tastes better. Public water treatment often involves the use of chlorine or chloramine to remove bacteria so that the water is safe to drink. Many people dislike the aftertaste that chlorine adds to their drinking water. Trace levels of other contaminants can find their way into public drinking water, but this is true of bottled water as well. At least with tap water you know it has been tested and that chemical levels meet federal safety guidelines. Bottled water is not held to the same standards and contaminant testing is performed by the company that sells the water bottles, and they are not required to disclose the results to the public. In this report from the Environmental Working Group you can read more about the lack of contaminant regulation in the bottled water industry.

Filters for drinking water are gaining popularity as the backlash against the bottled water industry gains momentum. The laws of supply and demand tell us that if we stop buying bottled water then companies like Coke, Pepsi, and others will stop producing bottled water in massive quantities. A water filter is an inexpensive solution to remove the poor taste from tap water caused by chlorine treatment. The contaminant reduction claims of most filters have been independently tested so you can be confident that you are drinking water with fewer impurities.

Another great way you can help out the environment is by filling a reusable water bottle for on-the-go use at the gym or around town. I recommend either a plastic bottle that is BPA free, or a stainless steel bottle. Disposable water bottles need to become a thing of the past. If you have not seen it yet, the documentary film Tapped provides an in depth view of the risk that continued bottled water use poses to one of our most basic natural resources, water. I highly recommend it and the film is only an hour or so in length and is available as an instant view on Netflix.

Technical Talk: Activated Carbon vs. Carbon Block

I wanted to take a look at point of use drinking water filters. A standard filter housing is compatible with hundreds of 10 inch replacement filter cartridges so you have a lot of options on what to use.

Carbon based filters rely on activated carbon to remove impurities from water. Activated carbon filters attract dissolved chemicals causing them to stick to the carbon surface as the water passes through the filter. This is often referred to as the adsorption process and effectively removes chlorine, particles and volatile organic chemicals (VOCs).

So when it comes to drinking water you should definitely use a carbon based filter cartridge to remove chlorine and other chemical contaminants. Carbon filters come in two types, granular activated filters (GAC) and extruded carbon block filters.

GAC filters have a porous structure allowing for a wide surface area and are best for slower flow rates to allow for more contact time with the filter media. GAC filters are often used for large scale filtration because it is cheaper while still having effective contaminant reduction.

Extruded carbon block filters are made by taking activated carbon and grinding it into a very fine dust before reforming it into a solid carbon block. Carbon block filters are stronger than GAC filters and will not collapse under pressure change. This means that a carbon block filter will not allow changes in water pressure to create channels where water can pass through unfiltered. Carbon block filters are the best choice for point of use drinking water filters due to their ability to remove contaminants more consistently throughout the life of the filter.

Is Fluoride dangerous?

Let’s start by setting aside a couple of myths about the fluoride being added to your drinking water.

1. It is not part of a vast government conspiracy to control the human population.

2. It will not prevent cavities from forming by itself (sorry kids, you still have to brush your teeth)

So what does it do and why did they start adding fluoride to our drinking water? The simple answer is that a government health review of fluoridated water shows that it helps reduce tooth decay by as much as 60%. Dentists used fluoride treatments to help fight cavities, but that only worked for the people who could afford regular dentist visits.

By adding fluoride to all drinking water the goal was to give everyone access to the benefit of fluoride treatments. In low doses it is not harmful to humans. About 10% of people may experience Dental Fluorosis due to the presence of Fluoride in their drinking water. Dental Fluorosis only occurs during tooth formation and ranges from mild (symmetrical whitish areas on the tooth) to severe (brownish discoloration) and is considered a cosmetic problem not a health risk.

Personally I would not want a very high amount of fluoride added to the public water supply, particularly in areas that already have naturally occurring fluoride in the water. But I can also see the benefits of having a small amount added to the water to help preserve healthy teeth.

I get asked a lot whether or not a carbon based water filter will reduce the level of fluoride in water and the answer is no, they do not. If you want to remove fluoride you would need to use a reverse osmosis system, but these are very expensive and in addition to removing fluoride and other harmful contaminants take out all the naturally occurring minerals that your body needs. My advice would be if you are worried about fluoride levels in your water have it tested to make sure it is not too high.

Water utilities may switches to Chloramine treatment

It has already happened in parts of the country and more water utilities may switch over to a new chemical treatment for drinking water. Chloramine has been used as a disinfectant since the 1930s, but many water utilities still primarily use chlorine treatments. The San Francisco Public Utility Commission recently made the switch in part because chloramine is considered to be more stable than chlorine for water treatment.

One of the drawbacks of the switch is that chlorine can be boiled out of water and will dissipate on standing, but chloramine will not dissipate in water. Water treated with chloramine should not be used for kidney dialysis machines or for fish tanks unless it is treated with a water filter first. If you need a filter system certified to reduce chloramine I recommend the Culligan US-EZ filter system as a simple point of use filter.

Many public water utilities will switch to a chloramine treatment once per year to help balance water treatment. You should be notified by your water utility prior to any change in treatment.

You can click on this link for more information on chloramine in drinking water.

Safe drinking water can still pose a risk to the elderly

A water quality study done in Sonoma County, CA by UC Berkeley showed that the elderly tend to be less tolerant to contaminants in drinking water. Sonoma County was targeted by the study because it meets all the Federal standards for water quality. Basically the water is “safe” to drink by government standards.

The study shows that the older residents were 12% more likely to experience more severe gastrointestinal illnesses. While 12% may not seem like much it is statistically significant because it lies outside the range of normal deviation. So while Federal standards are “safe” for most users, there is still a risk to people with weaker immune systems because trace levels of contaminants remain in drinking water.

Water filters are a practical way to solve the problem. You can take control of your drinking water quality by using a simple carbon filter, which will remove most particulate matter as well as chlorine taste and odor from your water.

Chlorine can trigger asthma symptoms

You can imagine my surprise when I found out that the chlorine that is used to disinfect many swimming pools and most public water supplies can cause an unsafe level of chlorine inhalation. I suffered from asthma symptoms for years growing up and in the summer time spent hours at the neighborhood pool.

Exposure to chlorine is not in itself that dangerous, but if you already suffer form allergies or asthma it certainly can aggravate your symptoms. Studies are also being conducted that indicate that prolonged exposure to chlorine can lead to an increased risk of developing asthma in children. One of the primary sources of chlorine exposure actually comes from showering as most water utilities use chlorine to disinfect water to remove harmful bacteria.

While it is virtually impossible to avoid contact with chlorine, it is a good idea to limit your exposure to it, especially if you already have allergy symptoms or asthma. Almost any water filter with a carbon based media will reduce the chlorine content in your water.

EPA to roll out more regulations for water safety

This should not come as a surprise as more and more chemicals being studied by researchers have been found to have potentially harmful effects on humans. For information from the EPA press release click here.

Some of the latest contaminants targeted for regulation are perchlorates, a chemical that is produced naturally and increased from man made interference, and can effect hormone levels in pregnant mothers. Studies have shown that perchlorates can interfere with the thyroid gland and this is the main reason it is being regulated.

The EPA has decided to address 15 others contaminants at the same time, they usually only tackle 1 chemical at a time, in an attempt to make it more cost effective to enact regulations for safer drinking water. While this is certainly a step closer to safer drinking water as a whole, we should not have to wait for federal water safety regulations to have safe drinking water.

Tapped: a documentary film

If you have not already checked out Tapped, the 2009 multiple award winner for best documentary film, I highly recommend it. The film does a great job of taking the viewer inside one of the most socially relevant and controversial issues facing the public: access to safe drinking water.

The bottled water boom of the past two decades has changed the way we view water. Bottled water manufacturer’s have managed to turn clean drinking water into a commodity to be bought and sold at a high price to the consumer. Due to a lack of regulation bottled water is often subject to less testing than tap water and in some cases is just bottled tap water.

According to the film Americans will consume 29,000,000 single serve water bottles every year. The cost to the environment is fairly drastic; from the plastic bottles themselves to the fuel used to transport them and the petrochemical plants where they are manufactured. That’s a lot of pollution and contamination.

There is a simple solution to the problem of bottled water waste. We can change our habits and start using reusable bottles, ones that don’t have BPA and other harmful chemicals that can leach into our drinking water, and use filtered tap water instead. In most cases using a water filter is safer and cheaper than buying bottled water while still tasting just as good if not better.