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Perfluorononanoic acid (PFNA)

Portland Water Bureau

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.

 

6

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010N/A00N/A
2011N/A00N/A
2012N/A00N/A
2013N/A00N/A
2014ND50ND
2015ND10ND

ppt = parts per trillion.

State and national drinking water standards and health guidelines

Health Guideline 1 ppt

The 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 PFCs most widely detected in drinking water. This health guideline applies to the entire class of PFCs detected in water.

ppt = parts per trillion.

All test results

Date Lab ID Result
2014-03-19201403200340AMND
2014-06-26201406270434AMND
2014-07-08201407090732AMND
2014-09-11201409120826AMND
2014-12-10201412110612AMND
2015-06-17201506180496AMND