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EWG's Tap Water Database — 2021 UPDATE

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Perfluoroheptanoic acid (PFHPA)

Waipahu-Ewa-Waianae

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.

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39

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND170ND
2014ND210ND
2015ND10ND
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 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
2013-07-01201307030663AMND
2013-07-01201307030716AMND
2013-07-01201307030714AMND
2013-07-01201307030685AMND
2013-07-01201307030661AMND
2013-07-01201307030712AMND
2013-07-01201307030687AMND
2013-07-05201307090226AMND
2013-07-05201307090228AMND
2013-07-05201307090222AMND
2013-07-08201307100912AMND
2013-07-08201307100908AMND
2013-07-08201307100910AMND
2013-07-08201307100916AMND
2013-07-08201307100914AMND
2013-07-09201307110695AMND
2013-07-09201307110697AMND
2014-01-03201401070165AMND
2014-01-04201401070157AMND
2014-01-05201401070162AMND
2014-01-06201401080575AMND
2014-01-06201401080569AMND
2014-01-06201401080573AMND
2014-01-06201401080571AMND
2014-01-07201401090460AMND
2014-01-07201401090458AMND
2014-01-08201401100234AMND
2014-01-08201401100236AMND
2014-01-10201401140234AMND
2014-01-10201401140240AMND
2014-01-10201401140236AMND
2014-01-11201401140238AMND
2014-01-12201401140232AMND
2014-01-13201401150384AMND
2014-01-14201401160432AMND
2014-06-04201406100325AMND
2014-06-16201406180445AMND
2014-07-15201407170579AMND
2015-01-13201501150509AMND