A concern that most people have is the cleanliness of the drinking water coming into their homes. It is this concern that leads to many people using water filters in their houses. A question that often arises, though, is just how effective water filtration is at keeping out undesirable elements.
It goes without saying, that filtered water is better than un-filtered water. That's why most municipal treatment works have water filters installed for the city. The problem is with chemicals that these filters can't remove, such as pesticides and prescription drugs etc.
Knowing that these chemicals can still be present in the water supplied to your home, it is common place for people to use water filters in their house as an extra layer of protection. Some people may use water filter jugs, while nowadays most refrigerators come with water filters already installed. All these filters have been tested and usually the ones that clean the water best are the ones you find in your refrigerators - but whatever you choose check they are certified to NCF standards 42 and 53. (If you see these NCF standards on your filtration device then you know that their effectiveness has been independently verified.)
It's also worth looking to see if the filter that you're looking to have installed reduces five leading contaminants: mercury, lead, chlorine, MTBE (methyl tertiary butyl ether), and VOCs (Volatile Organic Compounds).
Generally, you will find that you get what you pay for - if you want the best quality filtered water then you would go for a brand such as Culligan. But if you don't want to take on the expense of a bottled water company each month, you could look into charcoal filters which are available for home use. These filters can remove minerals, metals and dirt from the water (but not any viral contamination.) These home filters work well for most people, but just don't expect pure H20. For the most efficient water filtration device, many turn to micro-filtration (osmotic pressure), as this is a method that has been known to clean water most efficiently.
"The question you should be asking isn't so much "Does water filtration work?" Instead, you need to consider how well your current system is working and also consider the time, effort and cash you are willing to use to improve your current filtering system. For some, quality is paramount above all; others believe that their town's filtration system already does an adequate job. Different people have different needs and in different places the quality of water in the taps is different - you need to consider the best solution for your individual needs. However, generally, you want to be drinking clean water - not drugs or pesticides.
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