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EWG's Tap Water Database — 2021 UPDATE

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Perfluoroheptanoic acid (PFHPA)

City of Tucson

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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52

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND520ND
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 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
2013-04-15201304160052AMND
2013-04-15201304160056AMND
2013-04-15201304160050AMND
2013-04-15201304160054AMND
2013-04-16201304180588AMND
2013-04-16201304180590AMND
2013-04-16201304180594AMND
2013-04-16201304180586AMND
2013-04-17201304190458AMND
2013-04-17201304190462AMND
2013-04-17201304190460AMND
2013-04-22201304240203AMND
2013-04-22201304240197AMND
2013-04-22201304240201AMND
2013-04-22201304240199AMND
2013-04-23201304250529AMND
2013-04-23201304250527AMND
2013-04-23201304250523AMND
2013-04-23201304250525AMND
2013-04-24201304260166AMND
2013-04-24201304260162AMND
2013-04-24201304260164AMND
2013-04-29201305010451AMND
2013-04-29201305010449AMND
2013-04-29201305020190AMND
2013-04-29201305010447AMND
2013-10-08201310110337AMND
2013-10-08201310110333AMND
2013-10-08201310120152AMND
2013-10-08201310120150AMND
2013-10-08201310110331AMND
2013-10-08201310110335AMND
2013-10-09201310120160AMND
2013-10-09201310120156AMND
2013-10-09201310120154AMND
2013-10-09201310120158AMND
2013-10-09201310120162AMND
2013-10-14201310150054AMND
2013-10-14201310150056AMND
2013-10-14201310150052AMND
2013-10-14201310150058AMND
2013-10-16201310170124AMND
2013-10-16201310170118AMND
2013-10-16201310170120AMND
2013-10-16201310170122AMND
2013-10-16201310170126AMND
2013-10-17201310180357AMND
2013-10-17201310180353AMND
2013-10-17201310180355AMND
2013-10-17201310180359AMND
2013-10-29201310300082AMND
2013-11-20201311220543AMND