Know Your Environment. Protect Your Health.

Perfluorooctane sulfonate (PFOS)

Whispering Pines

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.

 

33

Samples

0

Samples exceeding legal limit (MCL)

20

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
20190.500 ppt41ND - 2.00 ppt
2020ND50ND
20212.24 ppt106ND - 4.90 ppt
20223.63 ppt883.10 ppt - 4.60 ppt
20234.20 ppt553.80 ppt - 5.00 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
2018-05-30GW1805301435EDKND
2019-03-28GWNT1903281200KERND
2019-06-21GWNT1906211400MKND
2019-09-18GWNT1909180900GGA2.00 ppt
2019-12-19GWNT1912190910KMEND
2020-03-25GWNT2003251210SKND
2020-06-29GWNT2006291600MKND
2020-10-05LJ27660ND
2020-10-05GWNT2010051130MKND
2020-10-05ND
2021-01-272101B51-014.20 ppt
2021-01-274.20 ppt
2021-03-162103738-014.90 ppt
2021-03-164.90 ppt
2021-06-29ND
2021-06-292106F84ND
2021-09-212.10 ppt
2021-09-212109A98-012.10 ppt
2021-12-20ND
2021-12-202112934-01ND
2022-03-212203C07-014.60 ppt
2022-03-214.60 ppt
2022-06-283.40 ppt
2022-06-282206K09-013.40 ppt
2022-09-213.40 ppt
2022-09-212209F43-013.40 ppt
2022-11-293.10 ppt
2022-11-292211F58-013.10 ppt
2023-02-282302C71-013.80 ppt
2023-02-283.80 ppt
2023-06-274.00 ppt
2023-09-185.00 ppt
2023-10-314.40 ppt