Perfluorooctane sulfonate (PFOS)

Garden City Park WD

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.

MORE ABOUT THIS CONTAMINANT

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2013	ND	5	ND
2014	ND	5	ND
2015	N/A	0	N/A
2016	N/A	0	N/A
2017	N/A	0	N/A
2018	N/A	0	N/A
2019	ND	4	ND

ppt = parts per trillion

State and national drinking water standards and health guidelines

EWG Health Guideline 1 ppt

The EWG Health Guideline of 1 ppt for PFOS was defined by EWG based on studies by Phillipe Grandjean of Harvard University and many other independent researchers who found reduced effectiveness of vaccines and adverse impacts on mammary gland development from exposure to PFOA and PFOS, the two PFAS most widely detected in drinking water. This health guideline applies to the entire class of PFAS detected in water.

EPA Maximum Contaminant
Level (MCL) 4 ppt

ppt = parts per trillion

All test results

Date	Lab ID	Result
2013-10-16	201310180424AM	ND
2013-10-17	201310180428AM	ND
2013-10-17	201310180430AM	ND
2013-10-24	201310250230AM	ND
2013-10-24	201310250228AM	ND
2014-04-17	35134966001AM	ND
2014-04-17	35134966003AM	ND
2014-04-28	35136020001AM	ND
2014-05-27	35139905003AM	ND
2014-05-27	35139905001AM	ND
2019-04-15	200-48258-2	ND
2019-05-03	200-48644-2	ND
2019-07-31	7099393002	ND
2019-08-27	70102790002	ND