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EWG's Tap Water Database — 2021 UPDATE

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Perfluorononanoic acid (PFNA)

Clifton Park Water Authority

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

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND90ND
2014ND90ND
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
2013-09-17201309180703AMND
2013-09-17201309180538AMND
2013-09-18201309190533AMND
2013-09-18201309190536AMND
2013-09-18201309190541AMND
2013-09-30201310010131AMND
2013-09-30201310010133AMND
2013-09-30201310010129AMND
2013-12-18201312190384AMND
2014-03-19201403200396AMND
2014-03-19201403200338AMND
2014-03-19201403200336AMND
2014-03-19201403200408AMND
2014-03-25201403270284AMND
2014-03-25201403270423AMND
2014-03-25201403270431AMND
2014-03-25201403270165AMND
2014-07-16201407180255AMND