A recent study published in the journal Environmental Science & Technology Letters has found that millions of Americans may have the industrial chemical polyfluoroalkyl and perfluoroalkyl substances or PFASs in their water. PFASs are found in food packaging materials, fabrics, etc, and have been linked to high cholestrol, obesity, hormone suprussion, and in some cases cancer.
These chemicals are not easily broken down by the body, taking 3.5 years to get rid of half of what you ingest. Furthermore, they are found in multiple places with 66 public water supplies serving 66 million Americans having at least one sample with a measure above the EPA-recommended safety limit:
Though 194 public water supplies with higher-than-recommended chemical concentrations are located in 33 states, three-quarters of the toxic water supplies are in just 13 states: California, New Jersey, North Carolina, Alabama, Florida, Pennsylvania, Ohio, New York, Georgia, Minnesota, Arizona, Massachusetts and Illinois.