Perfluoroheptanoic acid (PFHPA)

Sheppard Air Force Base

NOTE: Sheppard Air Force Base purchases water from City of Wichita Falls which is required to test for perfluoroheptanoic acid (pfhpa). Sample information shown below was taken by City of Wichita Falls.

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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Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2014	ND	5	ND
2015	ND	4	ND
2016	N/A	0	N/A
2017	N/A	0	N/A
2018	N/A	0	N/A
2019	N/A	0	N/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
2014-03-31	3000242	ND
2014-08-14	3083603	ND
2014-09-08	3099452	ND
2014-11-17	3140615	ND
2014-12-08	3151415	ND
2015-02-09	3183768	ND
2015-03-24	3213436	ND
2015-05-11	3239859	ND