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EWG's Tap Water Database — 2021 UPDATE

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Perfluorononanoic acid (PFNA)

Ridgewood Water

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

 

152

Samples

0

Samples exceeding legal limit (MCL)

19

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND480ND
2015ND40ND
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
20190.439 ppt10019ND - 3.20 ppt

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
2014-06-25201406260440AMND
2014-06-25201406260438AMND
2014-06-25201406260454AMND
2014-06-25201406260368AMND
2014-06-25201406260486AMND
2014-06-25201406260464AMND
2014-06-25201406260471AMND
2014-06-25201406260450AMND
2014-06-25201406260430AMND
2014-06-25201406260442AMND
2014-06-25201406260488AMND
2014-06-25201406260482AMND
2014-06-25201406260462AMND
2014-06-25201406260484AMND
2014-06-25201406260460AMND
2014-06-30201407010208AMND
2014-06-30201407010206AMND
2014-06-30201407010185AMND
2014-06-30201407010202AMND
2014-06-30201407010200AMND
2014-06-30201407010212AMND
2014-06-30201407010140AMND
2014-06-30201407010210AMND
2014-06-30201407010155AMND
2014-06-30201407010192AMND
2014-08-06201408070359AMND
2014-12-15201412160312AMND
2014-12-15201412160614AMND
2014-12-15201412160712AMND
2014-12-15201412160731AMND
2014-12-15201412160710AMND
2014-12-15201412160626AMND
2014-12-15201412160366AMND
2014-12-15201412160703AMND
2014-12-17201412180364AMND
2014-12-17201412180416AMND
2014-12-17201412180398AMND
2014-12-17201412180314AMND
2014-12-17201412180430AMND
2014-12-17201412180335AMND
2014-12-17201412180307AMND
2014-12-28201412300450AMND
2014-12-29201412300485AMND
2014-12-29201412300448AMND
2014-12-29201412300480AMND
2014-12-29201412300488AMND
2014-12-29201412300468AMND
2014-12-29201412300394AMND
2015-06-04201506050379AMND
2015-06-04201506050454AMND
2015-06-04201506050201AMND
2015-06-04201506050442AMND
2019-02-069983508ND
2019-02-069983520ND
2019-02-069983524ND
2019-02-0699835022.20 ppt
2019-02-069983505ND
2019-02-0699834843.20 ppt
2019-02-0699834872.50 ppt
2019-02-069983481ND
2019-02-069983469ND
2019-02-0699834722.30 ppt
2019-02-069983475ND
2019-02-069983478ND
2019-02-069983507ND
2019-02-069983522ND
2019-02-069983516ND
2019-02-069983518ND
2019-02-069983528ND
2019-02-069983530ND
2019-02-069983526ND
2019-02-0699835012.50 ppt
2019-02-0699834912.20 ppt
2019-02-0699834931.80 ppt
2019-02-069983504ND
2019-02-0699834833.10 ppt
2019-02-0699834862.30 ppt
2019-02-069983480ND
2019-02-069983468ND
2019-02-069983489ND
2019-02-0699834712.30 ppt
2019-02-069983474ND
2019-02-069983477ND
2019-02-079983535ND
2019-02-079983542ND
2019-02-079983550ND
2019-02-079983555ND
2019-02-079983534ND
2019-02-079983541ND
2019-02-079983549ND
2019-02-079983554ND
2019-02-209992346ND
2019-02-209992337ND
2019-02-209992334ND
2019-02-209992331ND
2019-02-209992347ND
2019-02-209992342ND
2019-02-209992338ND
2019-02-209992344ND
2019-02-209992332ND
2019-03-131010401ND
2019-03-131010463ND
2019-03-131010416ND
2019-03-131010398ND
2019-03-1310104462.80 ppt
2019-03-1310104042.30 ppt
2019-03-131010443ND
2019-03-131010449ND
2019-03-1310104521.90 ppt
2019-03-131010455ND
2019-03-131010440ND
2019-03-131010432ND
2019-03-131010400ND
2019-03-131010462ND
2019-03-131010418ND
2019-03-131010412ND
2019-03-131010414ND
2019-03-131010397ND
2019-03-1310104452.80 ppt
2019-03-1310104032.20 ppt
2019-03-131010442ND
2019-03-131010448ND
2019-03-131010406ND
2019-03-1310104511.80 ppt
2019-03-131010454ND
2019-03-131010439ND
2019-03-131010431ND
2019-03-141010420ND
2019-03-141010392ND
2019-03-141010421ND
2019-03-1410103951.90 ppt
2019-03-141010377ND
2019-03-141010380ND
2019-03-141010383ND
2019-03-141010437ND
2019-03-141010434ND
2019-03-141010460ND
2019-03-141010393ND
2019-03-141010425ND
2019-03-141010427ND
2019-03-141010423ND
2019-03-1410103941.80 ppt
2019-03-1410104082.00 ppt
2019-03-141010410ND
2019-03-141010376ND
2019-03-141010379ND
2019-03-141010382ND
2019-03-141010388ND
2019-03-141010438ND
2019-03-141010390ND
2019-03-141010435ND
2019-03-141010459ND