Choosing a system When choosing a water purifying system, there are many different options you should look at when considering the best system to buy. Some systems have filters designed to remove many contaminants, but may not be strong enough for other stronger contaminants such as fluoride, MTBE and even arsenic. These contaminants have studied and thought to cause problems with the liver and kidneys if continually drank in the water supply. Even though the elements are only trace amounts, over time these amounts build up in ones system and may cause health problems. What to look for Look for a purifying system that cleans the diluted water of chlorine, pesticides, herbicides, heavy metals such as lead, chromium and copper as well as naturally occurring sediment and other bacterial viruses. Most filters you will encounter eliminate these contaminants; however stronger filter systems are required for tougher contaminants such as fluoride. To rid this contaminant, you will need a filter that has the ability to utilize activated alumina to rid the water of the fluoride. Other elements such as MTBE, a gasoline additive, can be removed with a specialty MTBE filtration filter. Other important features It is important to verify that the water filtration systems that you are looking into are NSF certified. This means that the specific filter will carry out its job without fail. This means that the filter will adequately remove all of the contaminants listed as well as maintain the cleanliness of the quality. Slow, filtering systems allow the diluted water to be filtered correctly. This is due to the filter cleaning the contaminants thoroughly with the slow dripping fluid through the filter. Final features and thoughts The finalizing feature that you want to examine in filtration units is an external tap that has anti-microbial properties. This allows the tap to stay clean with cleaning. When the clean, filtered water exits the external tap, it will stay clean and filtered without any extra contaminants. The cleaning process of the water systems and their filters are relatively easy. With proper care and maintenance, you will have a water system that will continue to filter your drinking water correctly.