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EWG's Tap Water Database — 2021 UPDATE

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Perfluorononanoic acid (PFNA)

New York American Water - Merrick

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

 

27

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND100ND
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019ND170ND

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
2014-01-1324478901ND
2014-01-1324479101ND
2014-01-1324478001ND
2014-01-1324478201ND
2014-01-1424479301ND
2014-07-2826311601ND
2014-07-2826312701ND
2014-07-2926311401ND
2014-07-3026312501ND
2014-07-3026312301ND
2019-07-1543885801ND
2019-07-1543885501ND
2019-07-1543885601ND
2019-07-1543885901ND
2019-07-1543885201ND
2019-07-1543885701ND
2019-07-1543885401ND
2019-07-3145962401ND
2019-07-3145962501ND
2019-07-3146065701ND
2019-07-3145962901ND
2019-07-3145962801ND
2019-07-3145962601ND
2019-07-3145962701ND
2019-08-1546215601ND
2019-08-1546215501ND
2019-08-1546215401ND