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EWG's Tap Water Database — 2019 UPDATE

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Perfluorononanoic acid (PFNA)

Brown Deer Waterworks

NOTE: Brown Deer Waterworks purchases water from Milwaukee Waterworks which is required to test for perfluorononanoic acid (pfna). Sample information shown below was taken by Milwaukee Waterworks.

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
2013ND80ND
2014ND30ND
2015ND10ND
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: Brown Deer Waterworks purchases water from Milwaukee Waterworks which is required to test for perfluorononanoic acid (pfna). Sample information shown below was taken by Milwaukee Waterworks.

Date Lab ID Result
2013-02-112777864ND
2013-02-122778878ND
2013-05-062819865ND
2013-05-062819850ND
2013-08-052869989ND
2013-08-052869977ND
2013-11-042924745ND
2013-11-042924671ND