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EWG's Tap Water Database — 2019 UPDATE

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Perfluorooctane sulfonate (PFOS)

City of Alexandria

NOTE: City of Alexandria purchases water from Fairfax County Water Authority which is required to test for perfluorooctane sulfonate (pfos). Sample information shown below was taken by Fairfax County Water Authority.

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
2014ND30ND
2015ND10ND
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

NOTE: City of Alexandria purchases water from Fairfax County Water Authority which is required to test for perfluorooctane sulfonate (pfos). Sample information shown below was taken by Fairfax County Water Authority.

Date Lab ID Result
2013-07-17201307180824AMND
2013-07-17201307180828AMND
2013-07-17201307180811AMND
2013-07-17201307180820AMND
2013-07-17201307180822AMND
2013-10-15201310160200AMND
2013-10-15201310160176AMND
2013-10-15201310160171AMND
2013-10-15201310160208AMND
2013-10-15201310160210AMND
2014-01-13201401140197AMND
2014-01-13201401150723AMND
2014-01-13201401150621AMND
2014-01-13201401140199AMND
2014-01-14201401150684AMND
2014-04-14201404150439AMND
2014-04-14201404150283AMND
2014-04-14201404150405AMND
2014-04-14201404150441AMND
2014-04-14201404150219AMND