SimpleWater Tap Score


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This test includes analysis of the following compounds using EPA Method 537 for home sampling and laboratory testing:

Perfluorooctanoic acid (PFOA)
Perfluorooctane sulfonate (PFOS)
Perfluoroheptanoic acid (PFHpA)
Perfluorononanoic acid (PFNA)
Perfluorobutane sulfonate (PFBS)
Perfluorohexane sulfonate (PFHxS)

PFOA is one of the many PFCs (Perfluorinated Chemicals) manufactured for use in daily products. PFOA (Perfluorooctonoic acid), is a man-made compound that is used in the manufacture of Teflon and other plastics, however, it’s not significantly present in the final product. Humans are exposed to PFOA in small quantities through packaging and other plastic products. Most over-exposure results from ingesting contaminated water through irresponsible disposal of wastewater from industries as was the case in Hoosick Falls, NY.

PFOA, also known as C8 (because it has 8 carbons), is classified as a possible human carcinogen, Group 2B by IARC, a subsidiary/adviser of WHO. PFOA is a very stable compound and persists in the environment indefinitely.

The EPA just released an advisory for PFOAs in July 2016 setting the lifetime HA for PFOA at 0.7 ug/L (0.7ppb) and the value keeps approaching zero as more research emerges. Maine has set its limits to 0.1 ug/L.

While U.S is phasing out the use of PFOA and other PFCs, the stability and hence the persistence of these compounds makes them a lifetime concern. It’s found in water, ambient air, and occasionally indoor dust.

PFOA is neither included as an analyte in USGS’s NWQAP nor monitored by the EPA Aquatics Surveys.