Comparing Water Filters - Most Common Things To Look For:
Lead, Volatile Organic Compounds (VOCs), Organic Contaminants,
Disinfection By-Products, and Trihalomethanes (THMs) are the most noticeable
problems on these reports. Often these toxic chemicals exceed the
MCLGs or healthful thresholds.
Also, these thresholds are relevant only to the one contaminant;
if more than one contaminant is present, the thresholds for heath
risks drop considerably.
All performance claims and pricing were taken from the manufacturer’s literature and certified claims.
Many models were reviewed but not included in this
comparison because of undocumented performance claims.
Some brands made exaggerated claims in their literature
and on their company web sites that did not match the
"certified claims" on the product's "Performance Data
Sheet.” Only performance claims that have been certified
by the National Sanitation Foundation (NSF), Underwriter’s
Laboratory (UL), or the Dept. of Health were included
in our comparisons. The water treatment industry is
extremely regulated. Companies that market undocumented
products or make uncertified claims are heavily restricted
as to how and where they can sell their products. One
should beware of products that offer different performance
claims in different states. California, Wisconsin, Iowa,
and several other states prohibit uncertified claims.