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EWG's Tap Water Database — 2021 UPDATE

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Perfluorononanoic acid (PFNA)

Pasadena

Perfluorononanoic acid, otherwise known as PFNA or C9, is a PFC similar in function and use to PFOA. These chemicals were used in the production of non-stick, stain repellent and chemically inert coatings. Click here to read more about perfluorinated chemicals.

MORE ABOUT THIS CONTAMINANT

 

19

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND190ND
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/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 perfluorononanoic 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.

EPA Maximum Contaminant
Level (MCL) 10 ppt

ppt = parts per trillion

All test results

Date Lab ID Result
2013-03-28201303280392AMND
2013-03-28201303280333AMND
2013-03-28201303280376AMND
2013-03-28201303280390AMND
2013-03-28201303280329AMND
2013-03-28201303280381AMND
2013-03-28201303280373AMND
2013-06-20201306200423AMND
2013-06-20201306200453AMND
2013-06-20201306200410AMND
2013-09-18201309190003AMND
2013-09-18201309190009AMND
2013-09-18201309190005AMND
2013-09-18201309190007AMND
2013-09-18201309190011AMND
2013-09-18201309190001AMND
2013-12-19201312190426AMND
2013-12-19201312190417AMND
2013-12-19201312190424AMND