Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Perfluorononanoic acid (PFNA)

West Sound Utility District #1

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
2014ND90ND
2015ND90ND
2016N/A00N/A
2017N/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.

ppt = parts per trillion

All test results

Date Lab ID Result
2014-09-22201409240418AMND
2014-09-22201409240534AMND
2014-09-22201409240416AMND
2014-09-22201409240412AMND
2014-09-23201409250525AMND
2014-09-23201409250515AMND
2014-09-23201409250596AMND
2014-09-23201409250638AMND
2014-09-24201409260328AMND
2015-03-16201503180809AMND
2015-03-16201503180807AMND
2015-03-16201503180471AMND
2015-03-16201503180707AMND
2015-03-17201503190483AMND
2015-03-17201503190512AMND
2015-03-17201503190566AMND
2015-03-18201503200254AMND
2015-03-18201503200243AMND