Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Perfluorooctanoic acid (PFOA)

San Lorenzo Valley Water District

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

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019ND60ND

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
2014-01-21201401230101AMND
2014-01-21201401230103AMND
2014-01-22201401280188AMND
2014-01-22201401280185AMND
2014-01-27201401290321AMND
2014-01-28201401300126AMND
2014-01-28201401300128AMND
2014-04-23201404250083AMND
2014-07-09201407110262AMND
2014-07-09201407110260AMND
2014-07-15201407170536AMND
2014-07-16201407180197AMND
2014-07-16201407180199AMND
2014-07-16201407180184AMND
2014-07-16201407180201AMND
2014-10-14201410160335AMND
2019-04-299590-026-0847ND
2019-04-299590-025-0855ND
2019-07-299590-026-0800ND
2019-07-299590-025-0815ND
2019-10-149590-026-0900ND
2019-10-149590-025-0930ND