Perfluorooctanoic acid (PFOA)

King County Water District #49

NOTE: King County Water District #49 purchases water from Seattle Public Utilities which is required to test for perfluorooctanoic acid (pfoa). Sample information shown below was taken by Seattle Public Utilities.

Perfluorooctanoic acid (PFOA) is a member of a group of perfluorinated chemicals used in many consumer products. PFOA and other 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

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	4	ND
2015	ND	8	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 0.007 ppt

The EWG Health Guideline of 0.007 ppt for PFOA was proposed by California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

EPA Maximum Contaminant
Level (MCL) 4 ppt

ppt = parts per trillion

All test results

Date	Lab ID	Result
2015-01-13	201501140525AM	ND
2015-01-13	201501140778AM	ND
2015-04-06	201504070229AM	ND
2015-04-06	201504070359AM	ND
2015-07-22	201507230482AM	ND
2015-07-22	201507230496AM	ND
2015-10-13	201509280091AM	ND
2015-10-13	201509280090AM	ND