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EWG's Tap Water Database — 2019 UPDATE

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Perfluoroheptanoic acid (PFHPA)

North Penn Water Authority

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.

 

30

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
2014N/A00N/A
2015ND300ND
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
2015-01-133170080ND
2015-01-133170131ND
2015-01-133170061ND
2015-01-133170215ND
2015-01-133170015ND
2015-01-133170206ND
2015-01-133170233ND
2015-01-133170179ND
2015-01-133170153ND
2015-01-133170224ND
2015-01-133169995ND
2015-01-133170097ND
2015-01-133170193ND
2015-01-203173126ND
2015-04-083220950ND
2015-07-143282156ND
2015-07-143282210ND
2015-07-143282192ND
2015-07-143282143ND
2015-07-143282219ND
2015-07-143282242ND
2015-07-143282235ND
2015-07-143282183ND
2015-07-143282134ND
2015-07-143282174ND
2015-07-143282201ND
2015-07-143282228ND
2015-07-143282125ND
2015-07-143282165ND
2015-10-073336885ND