PFAS: 1 Parts Per Trillion (PPT) Is Equivalent To One Drop Of Water In 20 Olympic-Sized Swimming Pools

Remember this graph? Since it was produced, the EPA lowered their safe limit. It is closing in on 1 parts per trillion (ppt), down from 70.

This is how much 1 ppt is:

The 1 ppt has broad support, e.g. this study on immune suppression determined, “current limits appear to be several hundred fold too high.”

As EWG says, “Just because contamination is common doesn’t make it safe.”

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