Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Perfluorononanoic acid (PFNA)

Oro Valley Water Utility

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

 

32

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015ND320ND
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
2015-02-043181530ND
2015-02-043181519ND
2015-02-053182333ND
2015-02-053182409ND
2015-02-053182378ND
2015-02-053182361ND
2015-02-053182342ND
2015-02-113186744ND
2015-02-113186690ND
2015-02-123187589ND
2015-02-123187539ND
2015-02-123187580ND
2015-02-123187551ND
2015-02-123187530ND
2015-02-173189605ND
2015-02-183190594ND
2015-08-043293087ND
2015-08-043293072ND
2015-08-063294731ND
2015-08-063294704ND
2015-08-063294818ND
2015-08-063294764ND
2015-08-103296064ND
2015-08-103296113ND
2015-08-123299596ND
2015-08-123299486ND
2015-08-133300731ND
2015-08-133300715ND
2015-08-133300749ND
2015-08-133300740ND
2015-08-183303952ND
2015-08-183304001ND