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EWG's Tap Water Database — 2019 UPDATE

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Perfluorononanoic acid (PFNA)

University of Kansas

NOTE: University of Kansas purchases water from City of Lawrence which is required to test for perfluorononanoic acid (pfna). Sample information shown below was taken by City of Lawrence.

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.

 

8

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
2013ND30ND
2014ND10ND
2015N/A00N/A
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

NOTE: University of Kansas purchases water from City of Lawrence which is required to test for perfluorononanoic acid (pfna). Sample information shown below was taken by City of Lawrence.

Date Lab ID Result
2013-05-132824468ND
2013-05-132824503ND
2013-08-142877425ND
2013-08-142877413ND
2013-11-132930318ND
2013-11-132930257ND
2014-02-122972949ND
2014-02-122973017ND