Many people have some serious questions about water filters. Since water filters are a one time investment you want to make sure you get it right in the first go. This is why it is always best to ask the questions before hand. This will help you to make a better decision when you actually decide on buying one.

One of the things that people want to know is whether water filters have the potential to reduce MTBE content in water. The latest Pur water filters were tested for their effectiveness against MTBE and showed a removal rate 95 percent with MTBE influent of `5 ppb.

Another thing that people want to ensure prior to buying a water filter is whether or not the self monitoring water filters soften the water. Filters that soften the water should be avoided. On the other hand you would want to go for a water filter that does not reduce the level of fluoride to a great extent.

One of the most important things that you need protection against is cryptosporidium. This is a waterborne infectious microorganism which comes into the water supply because of animal feces. This can be a deadly disease causing bacteria and hence you should look for powerful water filters from companies like Purwaterfilter.com that rid the water of all such impurities.

However you should also be aware of the capabilities of your water filter. While filters are successful in removing impurities in general they cannot transform biologically unsafe water into pure drinking water and should not be used in this manner.