Perfluorooctane sulfonate (PFOS)

Medina City PWS

NOTE: Medina City PWS purchases water from Avon Lake City PWS which is required to test for perfluorooctane sulfonate (pfos). Sample information shown below was taken by Avon Lake City PWS.

Perfluorooctane sulfonate (PFOS) is a member of a group of perfluorinated chemicals used in many consumer products. PFOS 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
2013	ND	3	ND
2014	ND	1	ND
2015	N/A	0	N/A
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 PFOS 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.

EPA Maximum Contaminant
Level (MCL) 4 ppt

ppt = parts per trillion

All test results

NOTE: Medina City PWS purchases water from Avon Lake City PWS which is required to test for perfluorooctane sulfonate (pfos). Sample information shown below was taken by Avon Lake City PWS.

Date	Lab ID	Result
2014-02-12	201402190143AM	ND
2014-05-05	201405090536AM	ND
2014-08-13	201408190577AM	ND
2014-11-12	201411180195AM	ND