What is the purpose of filtering water?

Now that you know what kind of water is safe to drink, you know that tap water is the winner when it comes to cost and environmental impact.

But although it is drinkable (in the sense of its administrative definition) almost everywhere in Europe, it can be loaded with pollutants that you do not want, neither for you nor for your children. It is mainly chemical pollution (pesticides, nitrates, etc.) from conventional agriculture, heavy metal or PCB pollution from industry, but also medical residues from medicine: antibiotics - which are now suspected to be the cause of the development of resistant bacteria, estrogen-progesterone contained in women's pills and discharged through urine, antidepressant residues, and even anticancer products.)

Some of these pollutants are endocrine disruptors (bisphenol A, phthalates) whose dangers we know today.

Although the concentration of these wastes is often very low, it constitutes a risk for our health as they accumulate in the body over time and because of the "cocktail effect" which acts synergistically.

But don't panic! There are some simple ways to get rid of it with a Berkey® water purifier.

Drinking filtered water with Berkey®

The different solutions for filtering tap water

The carafe filter

Equipped with an activated carbon filter, it eliminates the taste of chlorine, limestone and lead. No real action on chemical pollutants. The main drawback is the frequency with which the filter must be changed (every 4 to 6 weeks if you want to keep the filtering power), the resulting cost, but above all, the fact that the filters can potentially rediffuse certain contaminants in the filtered water (and that's no longer of much use!). They can be real microbial nests when they are badly used, which is the case most of the time.

On the following page you will find the clear advantages of a Berkey® gravity filter over a carafe filter: Berkey® purifier or carafe filter?

Osmosis units

Often made up of several filters in series, water undergoes a process called reverse osmosis which removes certain pollutants but unfortunately also all minerals such as calcium and magnesium. However, they are essential to our balance and drinking osmosis water entails a real risk of deficiency. But its main concern comes from the filtration system. Indeed, to function, it is necessary to project at high pressure the equivalent of 3 to 7 liters of water to produce one. This leads to a real waste of water. Its cost remains very high if we take into account the purchase price of the device, the renewal cost of the filters and the water rejected.

Faucet or under-sink filters

These filters work on the same principle as filtering carafes with the same disadvantages concerning the need to change the cartridges regularly and especially the risk of releasing pollutants into the filtered water.

Gravity water filters

It is the most widely used water purification technique in the world. They consist of two parts: an upper part into which the water to be filtered is introduced and a lower tank with a tap that stores and distributes the filtered water. The water passes naturally from one tank to the other by gravity through filters that will retain pollutants. Simplicity and efficiency.

The main advantage of this system is that it requires very little maintenance, there is no installation to be done and it works wherever it is needed. The cost per liter is the lowest of all existing solutions.

In this category, Berkey filters are the best in the world! No, no, no! Not only do we at the Berkey®Store speak for ourselves, we can prove it to you by explaining how it works, but we can also provide you with all of the most rigorous analyses performed on Berkey® filters.

Finally, on this page, you will find expert advice on how to choose the right water filter: Choosing the best water filter for your home.