Know Your Environment. Protect Your Health.

Perfluorooctane sulfonate (PFOS)

Watchtower Bible Tract Society

Perfluorooctane sulfonate (PFOS) is a member of a group of perfluorinated chemicals used in many consumer products. PFOS and other perfluorinated chemicals can cause serious health effects, including cancer, endocrine disruption, accelerated puberty, liver and immune system damage, and thyroid changes. These chemicals are persistent in the environment and they accumulate in people. Click here to read more about perfluorinated chemicals.

 

7

Samples

0

Samples exceeding legal limit (MCL)

7

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
2021N/A00N/A
20220.723 ppt440.607 ppt - 1.01 ppt
20230.680 ppt330.637 ppt - 0.767 ppt

ppt = parts per trillion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.3 ppt

The EWG Health Guideline of 0.3 ppt for PFOS was defined by EPA's final toxicity value from the Office of Water’s Final Human Health Toxicity Assessment. This health guideline protects againat cardiovascular harm and harm to fetal growth.

EPA Maximum Contaminant
Level (MCL): 4 ppt

ppt = parts per trillion

All test results

Date Lab ID Result
2022-02-08L2206684-010.640 ppt
2022-05-24L2223309-011.01 ppt
2022-07-06L2235777-20.607 ppt
2022-10-05L2255041-020.633 ppt
2023-01-04L2300306-020.767 ppt
2023-04-05L2317855-01PFO0.637 ppt
2023-04-05L2317855-02PFAS0.637 ppt