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EWG's Tap Water Database — 2021 UPDATE

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Perfluorononanoic acid (PFNA)

Manhasset Lakeville WD

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

 

19

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND180ND
2015ND10ND
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
2014-04-2235135233001AMND
2014-04-2235135233003AMND
2014-04-2235135233007AMND
2014-04-2235135233005AMND
2014-04-2435135554003AMND
2014-04-2435135554001AMND
2014-04-2935136168001AMND
2014-06-2335143240001AMND
2014-06-3035144500001AMND
2014-10-2935162558013AMND
2014-10-2935162558003AMND
2014-10-2935162558009AMND
2014-10-2935162558011AMND
2014-10-3035162558001AMND
2014-10-3035162558005AMND
2014-10-3135162558007AMND
2014-12-3035169791003AMND
2014-12-3035169791001AMND
2015-06-2535194932001AMND