Know Your Environment. Protect Your Health.

Perfluorooctane sulfonate (PFOS)

Old Westbury

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.

 

70

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019ND60ND
2020ND240ND
2021ND80ND
2022ND140ND
2023ND180ND

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
2019-11-1570112018003ND
2019-11-1570112018001ND
2019-11-1870112196001ND
2019-11-1870112196003ND
2019-12-0470114012002ND
2019-12-0470114012005ND
2020-02-0670120952001ND
2020-02-0670120952004ND
2020-02-0670120952003ND
2020-02-0670120952002ND
2020-02-1170121351002ND
2020-02-1170121351001ND
2020-02-1870122151002ND
2020-02-1870122151001ND
2020-02-2470122752002ND
2020-02-2470122752003ND
2020-02-2570122904001ND
2020-02-2570122904002ND
2020-04-1470128026001ND
2020-04-1670128227001ND
2020-04-2770129218001ND
2020-04-2970129420001ND
2020-05-0470129805003ND
2020-05-0470129805001ND
2020-08-2570143187002ND
2020-08-2570143187001ND
2020-09-0970145143001ND
2020-09-1070145281001ND
2020-09-1470145712001ND
2020-09-2170146589001ND
2021-05-0570171626002ND
2021-05-2670174518001ND
2021-08-1170183644002ND
2021-08-1870184479001ND
2021-08-2570185223002ND
2021-11-1070194292001ND
2021-11-1670194898001ND
2021-12-2270198898001ND
2022-02-0970203487001ND
2022-02-1570204181001ND
2022-03-0970206884001ND
2022-04-2770212478001-PFASND
2022-05-0470213403001-PFASND
2022-05-2570215952002ND
2022-07-1970222654001-PFASND
2022-07-2170222874001-PFASND
2022-07-2770223541001-PFASND
2022-08-1770226250001-PFASND
2022-08-2470227004001-PFASND
2022-11-1470236636001-PFASND
2022-11-1670237103001-PFASND
2022-12-2170240933001-PFASND
2023-02-0870245579001-PFASND
2023-02-1570246419001ND
2023-02-2270247119001ND
2023-04-1970253384002ND
2023-05-0370254928002ND
2023-05-1070255820001ND
2023-08-1623H2743-04ND
2023-08-1623H2743-03ND
2023-08-1623H2743-01ND
2023-08-1623H2743-05ND
2023-08-1623H2743-02ND
2023-08-1723H3092-01ND
2023-11-0123K0847-01ND
2023-11-0123K0847-02ND
2023-11-0823K1628-01ND
2023-11-0823K1628-02ND
2023-11-2923L0059-02ND
2023-11-2923L0059-01ND