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EWG's Tap Water Database — 2021 UPDATE

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Perfluorooctane sulfonate (PFOS)

Town of Gilbert

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

 

38

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND340ND
2014ND20ND
2015ND20ND
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/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.

EPA Maximum Contaminant
Level (MCL) 4 ppt

ppt = parts per trillion

All test results

Date Lab ID Result
2013-04-22201304220123AMND
2013-04-22201304220119AMND
2013-04-22201304220110AMND
2013-04-22201304220121AMND
2013-04-22201304220125AMND
2013-04-22201304220127AMND
2013-04-22201304220129AMND
2013-04-22201304220108AMND
2013-04-23201304230215AMND
2013-04-23201304230213AMND
2013-04-23201304230211AMND
2013-04-24201304240159AMND
2013-04-24201304240157AMND
2013-04-24201304240155AMND
2013-04-25201304250476AMND
2013-04-25201304250474AMND
2013-07-25201307250327AMND
2013-07-25201307250331AMND
2013-10-14201310140286AMND
2013-10-14201310140288AMND
2013-10-14201310140278AMND
2013-10-14201310140284AMND
2013-10-14201310140276AMND
2013-10-15201310150552AMND
2013-10-15201310150548AMND
2013-10-15201310150546AMND
2013-10-15201310150550AMND
2013-10-16201310160451AMND
2013-10-16201310160453AMND
2013-10-22201310220322AMND
2013-10-22201310220320AMND
2013-10-22201310220324AMND
2013-10-23201310230756AMND
2013-10-23201310230754AMND
2014-01-09201401090391AMND
2014-01-21201401210278AMND
2015-06-15201506150309AMND
2015-12-13201512140112AMND