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EWG's Tap Water Database — 2021 UPDATE

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Perfluorononanoic acid (PFNA)

Los Angeles County WW District 4 & 34-Lancaster

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

 

38

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND160ND
2014ND180ND
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018ND40ND
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
2013-11-14201311150378AMND
2013-11-18201311200623AMND
2013-11-18201311200611AMND
2013-11-18201311210815AMND
2013-11-18201311210801AMND
2013-11-19201311220610AMND
2013-11-19201311220608AMND
2013-11-19201311250078AMND
2013-11-19201311250062AMND
2013-11-20201311270082AMND
2013-11-20201312020184AMND
2013-11-20201312020193AMND
2013-11-20201311270080AMND
2013-11-25201312030254AMND
2013-11-25201312030252AMND
2013-11-25201312040648AMND
2014-02-13201402140365AMND
2014-05-13201405160338AMND
2014-05-13201405160381AMND
2014-05-13201405160379AMND
2014-05-14201405190269AMND
2014-05-14201405220244AMND
2014-05-14201405160332AMND
2014-05-14201405160334AMND
2014-05-14201405190271AMND
2014-05-14201405160336AMND
2014-05-20201405230366AMND
2014-05-20201405220248AMND
2014-05-21201405230356AMND
2014-05-21201405290634AMND
2014-05-21201405230368AMND
2014-05-27201405290650AMND
2014-05-27201405290654AMND
2014-08-07201408120547AMND
2018-08-019590-042-0930ND
2018-08-019590-021-0925ND
2018-08-019590-034-0915ND
2018-08-079590-073-1000ND