Page 10 - PFOA Slideshow November 1, 2021
P. 10

Understanding Parts Per Trillion











                      1 part per trillion (ppt) is equal to:





             One single drop of food coloring in 18



                   million gallons of water



             Or…1 single second out of 32,000 years



             Or…1 drop of water in 20 Olympic-sized



                   swimming pools
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