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EWG's Tap Water Database — 2019 UPDATE

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Perfluorooctane sulfonate (PFOS)

City of Angleton

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.

 

12

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
2013ND60ND
2014ND60ND
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
2013-08-27Q1306185005ND
2013-08-27Q1306185003ND
2013-08-27Q1306185001ND
2013-11-20Q1314129005ND
2013-11-20Q1314129003ND
2013-11-20Q1314129001ND
2014-02-25Q1405933001ND
2014-02-25Q1405933003ND
2014-02-25Q1405933005ND
2014-05-19Q1416779005ND
2014-05-19Q1416779003ND
2014-05-19Q1416779001ND