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EWG's Tap Water Database — 2021 UPDATE

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Perfluorobutane sulfonate (PFBS)

North Alamo Water Supply Company

Perfluorobutane sulfonate (PFBS) 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

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND220ND
2014N/A00N/A
2015N/A00N/A
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 perfluorobutane sulfonate 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
2013-03-181303647-014END
2013-03-181303647-016END
2013-03-181303647-012END
2013-03-181303647-010END
2013-03-181303647-018END
2013-03-181303647-008END
2013-06-17Q1302491009ND
2013-06-17Q1302491005ND
2013-06-17Q1302491003ND
2013-06-17Q1302491007ND
2013-06-17Q1302491001ND
2013-09-19Q1307746007ND
2013-09-19Q1307746009ND
2013-09-19Q1307746003ND
2013-09-19Q1307746001ND
2013-09-19Q1307746011ND
2013-09-19Q1307746005ND
2013-12-10Q1316886007ND
2013-12-10Q1316886001ND
2013-12-10Q1316886003ND
2013-12-10Q1316886005ND
2013-12-10Q1316886009ND