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EWG's Tap Water Database — 2019 UPDATE

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Perfluoroheptanoic acid (PFHPA)

City of Hewitt

Perfluoroheptanoic acid is a member of a group of perfluorinated chemicals used in many consumer products. 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.

 

10

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
2013ND40ND
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 perfluoroheptanoic acid 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
2013-10-09Q1308728005ND
2013-10-09Q1308728003ND
2013-10-09Q1308728001ND
2013-10-09Q1308728007ND
2014-01-14Q1400599001ND
2014-04-17Q1412218007ND
2014-04-17Q1412218001ND
2014-04-17Q1412218003ND
2014-04-17Q1412218005ND
2014-07-29Q1431973001ND