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EWG's Tap Water Database — 2019 UPDATE

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Perfluorooctane sulfonate (PFOS)

Prescott Valley WD Upper

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.

 

22

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
2014ND110ND
2015ND110ND
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
2014-12-08201412110334AMND
2014-12-08201412100580AMND
2014-12-08201412110324AMND
2014-12-08201412100471AMND
2014-12-08201412110257AMND
2014-12-08201412110322AMND
2014-12-08201412100582AMND
2014-12-08201412100594AMND
2014-12-08201412110346AMND
2014-12-09201412100849AMND
2014-12-10201412100788AMND
2015-06-09201506100411AMND
2015-06-09201506100569AMND
2015-06-09201506100559AMND
2015-06-09201506100400AMND
2015-06-09201506100542AMND
2015-06-09201506100537AMND
2015-06-09201506100544AMND
2015-06-09201506100370AMND
2015-06-09201506100464AMND
2015-06-09201506100554AMND
2015-06-09201506100383AMND