Perfluorinated compounds - Unregulated substances

EPA has not established national primary drinking water regulations for perfluorinated compounds. However, EPA is evaluating whether to regulate these compounds as drinking water contaminants through the process required by the Safe Drinking Water Act.
As part of this process, some drinking water sources were tested for six perfluorinated compounds including PFOA, PFOS, PFHpA, PFHxS, PFNA and PFBS.
How can a substance become regulated?
To regulate a contaminant under the Safe Drinking Water Act, EPA must determine that the substance: 
  1. May have adverse health effects.
  2. Occurs frequently (or there is a substantial likelihood that it occurs frequently) at levels of health concerns.
  3. There is a meaningful opportunity for health risk reduction for people served by public water systems.