EWG guidelines are made up guidelines to show you how you need their filter system. The US EPS sets the drinking water standards, and they are ridiculously low and many cased there is no process available to treat water to remove that contaminants identified. Some of the contaminants listed are disinfection by-products (DBP). Adding chorine to water to kill pathogens produces some by-products, but adding chlorine to the water saved millions of lives, while there is NO EVIDENCE that the disinfection bi-products caused any cancers, but the US water agencies have spent billions of dollars in additional treatment systems to remove the DBPs.
Damn, I just checked my zip codes water and Arsenic is 388x past the "ewg health guideline".
EWG guidelines are made up guidelines to show you how you need their filter system. The US EPS sets the drinking water standards, and they are ridiculously low and many cased there is no process available to treat water to remove that contaminants identified. Some of the contaminants listed are disinfection by-products (DBP). Adding chorine to water to kill pathogens produces some by-products, but adding chlorine to the water saved millions of lives, while there is NO EVIDENCE that the disinfection bi-products caused any cancers, but the US water agencies have spent billions of dollars in additional treatment systems to remove the DBPs.
https://www.epa.gov/dwreginfo/chemical-contaminant-rules