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EWG's Tap Water Database — 2019 UPDATE

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Perfluorooctane sulfonate (PFOS)

California Water Service (CWS) - Salinas

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.

 

39

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
2014ND390ND
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A

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.

ppt = parts per trillion

All test results

Date Lab ID Result
2014-04-02201404030345AMND
2014-04-02201404030380AMND
2014-04-03201404040299AMND
2014-04-08201404090685AMND
2014-04-09201404100792AMND
2014-04-09201404120175AMND
2014-04-09201404100823AMND
2014-04-10201404150244AMND
2014-04-10201404120153AMND
2014-04-10201404120142AMND
2014-04-10201404120135AMND
2014-04-10201404120073AMND
2014-04-16201404190041AMND
2014-04-16201404190070AMND
2014-04-17201404190052AMND
2014-04-17201404190061AMND
2014-04-22201404230387AMND
2014-04-24201404250183AMND
2014-04-29201404300783AMND
2014-05-29201405300255AMND
2014-09-09201409100990AMND
2014-09-09201409100979AMND
2014-09-10201409110693AMND
2014-09-10201409110895AMND
2014-09-11201409120735AMND
2014-09-15201409160394AMND
2014-09-16201409170784AMND
2014-09-16201409180649AMND
2014-09-16201409170674AMND
2014-09-16201409170648AMND
2014-09-17201409180666AMND
2014-09-18201409190380AMND
2014-09-18201409200136AMND
2014-09-18201409190388AMND
2014-09-19201409230180AMND
2014-09-25201409260423AMND
2014-09-25201409260432AMND
2014-09-25201409260414AMND
2014-09-25201409260403AMND