Perfluoroheptanoic acid (PFHPA)

Hudson Water Supply

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.

MORE ABOUT THIS CONTAMINANT

175

Samples

Samples exceeding legal limit (MCL)

107

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	N/A	0	0	N/A
2015	3.33 ppt	6	2	ND - 10.00 ppt
2016	7.85 ppt	12	12	2.40 ppt - 18.0 ppt
2017	8.37 ppt	24	24	2.30 ppt - 28.0 ppt
2018	7.59 ppt	26	26	2.80 ppt - 29.0 ppt
2019	4.27 ppt	107	43	ND - 26.0 ppt

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	Result
2015-03-25	ND
2015-04-30	10.00 ppt
2015-06-25	ND
2015-09-28	ND
2015-10-27	10.00 ppt
2015-12-23	ND
2016-08-31	14.0 ppt
2016-08-31	2.40 ppt
2016-08-31	3.60 ppt
2016-08-31	18.0 ppt
2016-08-31	3.70 ppt
2016-08-31	14.0 ppt
2016-10-25	6.60 ppt
2016-10-25	2.80 ppt
2016-10-25	3.70 ppt
2016-10-25	15.0 ppt
2016-10-25	3.80 ppt
2016-10-25	6.60 ppt
2017-02-28	9.30 ppt
2017-02-28	2.30 ppt
2017-02-28	3.50 ppt
2017-02-28	24.0 ppt
2017-02-28	4.10 ppt
2017-02-28	9.30 ppt
2017-05-23	10.00 ppt
2017-05-23	2.60 ppt
2017-05-23	4.20 ppt
2017-05-23	28.0 ppt
2017-05-23	3.20 ppt
2017-05-23	10.00 ppt
2017-08-23	8.50 ppt
2017-08-23	2.60 ppt
2017-08-23	4.40 ppt
2017-08-23	22.0 ppt
2017-08-23	4.60 ppt
2017-08-23	8.50 ppt
2017-11-28	6.50 ppt
2017-11-28	2.90 ppt
2017-11-28	4.10 ppt
2017-11-28	16.0 ppt
2017-11-28	3.80 ppt
2017-11-28	6.50 ppt
2018-03-21	3.70 ppt
2018-03-21	3.80 ppt
2018-03-21	3.10 ppt
2018-03-21	3.20 ppt
2018-03-21	3.90 ppt
2018-03-21	4.00 ppt
2018-03-21	4.40 ppt
2018-03-21	4.50 ppt
2018-03-21	3.80 ppt
2018-06-26	11.0 ppt
2018-06-26	2.80 ppt
2018-06-26	4.00 ppt
2018-06-26	29.0 ppt
2018-06-26	4.60 ppt
2018-06-26	11.0 ppt
2018-09-12	9.90 ppt
2018-09-12	3.30 ppt
2018-09-12	4.60 ppt
2018-09-12	27.0 ppt
2018-09-12	5.70 ppt
2018-09-12	9.90 ppt
2018-12-04	4.80 ppt
2018-12-04	4.30 ppt
2018-12-04	22.0 ppt
2018-12-04	4.10 ppt
2018-12-04	4.80 ppt
2019-01-24	12.0 ppt
2019-01-24	12.0 ppt
2019-02-19	12.0 ppt
2019-02-26	14.0 ppt
2019-02-26	19.0 ppt
2019-02-26	5.20 ppt
2019-02-26	26.0 ppt
2019-02-26	4.30 ppt
2019-02-26	14.0 ppt
2019-03-11	14.0 ppt
2019-03-11	14.0 ppt
2019-03-19	15.0 ppt
2019-04-04	13.0 ppt
2019-04-04	13.0 ppt
2019-05-02	14.0 ppt
2019-05-02	5.30 ppt
2019-05-02	25.0 ppt
2019-05-02	4.90 ppt
2019-05-02	14.0 ppt
2019-05-03	ND
2019-05-03	ND
2019-05-03	ND
2019-07-18	7.70 ppt
2019-07-18	4.70 ppt
2019-07-18	22.0 ppt
2019-07-18	3.60 ppt
2019-07-18	7.70 ppt
2019-07-31	ND
2019-07-31	ND
2019-08-01	ND
2019-08-01	ND
2019-08-01	10.6 ppt
2019-08-02	ND
2019-08-02	ND
2019-08-02	ND
2019-08-02	ND
2019-08-02	ND
2019-08-02	9.90 ppt
2019-08-02	ND
2019-08-02	ND
2019-08-02	ND
2019-08-16	ND
2019-08-16	ND
2019-08-16	ND
2019-08-16	ND
2019-08-16	7.90 ppt
2019-08-22	ND
2019-08-22	ND
2019-08-22	ND
2019-08-22	ND
2019-08-22	7.46 ppt
2019-08-28	ND
2019-08-28	8.10 ppt
2019-08-28	ND
2019-08-28	ND
2019-08-28	ND
2019-08-28	7.90 ppt
2019-08-28	ND
2019-08-28	ND
2019-08-28	ND
2019-09-19	2.00 ppt
2019-09-19	8.50 ppt
2019-09-19	ND
2019-09-19	ND
2019-09-19	ND
2019-09-19	7.10 ppt
2019-09-19	ND
2019-09-19	ND
2019-09-19	ND
2019-09-26	ND
2019-09-26	ND
2019-09-26	ND
2019-09-26	ND
2019-09-26	5.94 ppt
2019-10-16	ND
2019-10-16	6.40 ppt
2019-10-16	ND
2019-10-16	ND
2019-10-16	ND
2019-10-16	5.90 ppt
2019-10-16	ND
2019-10-16	ND
2019-10-16	ND
2019-10-24	ND
2019-10-24	ND
2019-10-24	ND
2019-10-24	ND
2019-10-24	4.49 ppt
2019-10-24	ND
2019-11-18	4.20 ppt
2019-11-18	13.0 ppt
2019-11-18	ND
2019-11-18	ND
2019-11-18	ND
2019-11-18	13.0 ppt
2019-11-18	ND
2019-11-18	ND
2019-11-18	ND
2019-12-12	12.0 ppt
2019-12-12	13.0 ppt
2019-12-12	ND
2019-12-12	ND
2019-12-12	ND
2019-12-12	13.0 ppt
2019-12-12	ND
2019-12-12	ND
2019-12-12	ND