NSF/FDA wants ALL potable municipal water filtered to 1,2ÁM (99.99%).
Rich... this is good news... regarding what we need to filter and insure we don't drink is beyond this forum... but here is a list of the contaminants allowed to be in municipal water whether natural occurring or introduced through other mechanisms...
"All sources of drinking water contain some naturally occurring contaminants. At low levels, most of these contaminants are not considered by the EPA to be harmful. Naturally occurring contaminants include radon, radium, and arsenic. In addition, people, animals, and industry can also add contaminants to our water supplies. Some of the more common contaminants that can be introduced into our water supplies include microorganisms, pesticides, and nitrates.
Below is a list of many of the common contaminants that can be found in public and private drinking water supplies. In addition, we have also included several chemicals commonly used to treat our drinking water supplies. If you would like to see further information on a specific contaminant, please select that contaminant."
Taste and Odor
Total Dissolved Solids (TDS)
Volatile Organic Chemicals (VOCs)
Those that don't want to filter the water... Fine... I'll filter mine to the best of my ability!