Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Perfluorooctane sulfonate (PFOS)

Mission Springs 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.

 

20

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
2013ND100ND
2014ND100ND
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
2013-07-23201307240884AMND
2013-07-23201307240876AMND
2013-07-23201307240887AMND
2013-07-23201307240890AMND
2013-07-23201307240881AMND
2013-07-24201307260144AMND
2013-07-24201307260147AMND
2013-07-24201307260138AMND
2013-07-24201307260128AMND
2013-07-24201307260132AMND
2014-01-07201401080972AMND
2014-01-07201401080976AMND
2014-01-07201401080962AMND
2014-01-07201401080996AMND
2014-01-07201401080974AMND
2014-01-14201401150804AMND
2014-01-14201401150816AMND
2014-01-14201401150821AMND
2014-01-14201401150811AMND
2014-01-14201401150802AMND