Okay so now you know what is in your water, and maybe you even looked into getting a water filter. But yes, there is more than one kind. Which one do you get? I've compiled a list of different water filters and what they filter out with some help from my environmental medicine professor:
Removes radon, organic chemicals, chlorine, some pesticides, lead, and trihalomethanes
Fails at removing other heavy metals
Likely need to be changed every 2-3 months
Ion Exchange Filter
Removes heavy metals and hard minerals
Leaves sodium in the water
Brita filters use a combination of carbon and ion exchange filters
Removes aresenic, some pesticides and heavy metals
Fails at removing volatile organic comounds (VOC's), trihalomethanes, and other pesticides
The down side to this is that it also takes out minerals that are needed for better absorption. This is the type of water filter we use at school, and I just bought some trace mineral drops for $10 on amazon to add back into the water. I bought them a year ago and am not even half way through the bottle, so they last awhile.
I hope this helped shed some light on the different types of water filters available!
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