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EWG's Tap Water Database — 2021 UPDATE

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Perfluorononanoic acid (PFNA)

California Water Service (CWS) - Bakersfield

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

 

85

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND400ND
2015ND420ND
2016ND30ND
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
2014-06-09A4E0742-01AND
2014-06-09A4E0742-09AND
2014-06-16A4E2256-01AND
2014-06-16A4E2250-01AND
2014-07-14A4F2472-01AND
2014-07-15A4F2473-01AND
2014-07-15A4F1974-01AND
2014-07-15A4F1967-01AND
2014-07-15A4F2477-01AND
2014-07-15A4F2476-01AND
2014-07-17A4F2474-01AND
2014-07-18A4G0684-01AND
2014-07-18A4G0683-01AND
2014-08-11A4G2144-01AND
2014-08-18A4H0210-01AND
2014-08-29A4G2146-01AND
2014-09-08A4H2667-01AND
2014-09-08A4G2149-01AND
2014-09-08A4G2782-01AND
2014-09-08A4H0209-01AND
2014-09-08A4G2780-01AND
2014-09-10A4H2706-01AND
2014-09-10A4G2779-01AND
2014-09-18A4I0206-01AND
2014-09-23A4I0209-01AND
2014-09-23A4I1702-01AND
2014-09-23A4H2659-01AND
2014-10-07A4H2671-01AND
2014-10-10A4I2124-01AND
2014-10-13A4J0081-01AND
2014-10-17A4J1137-01AND
2014-10-17A4I2273-01AND
2014-10-21A4J1136-01AND
2014-10-24A4H2664-01AND
2014-10-24A4J1422-01AND
2014-12-02A4K0896-01AND
2014-12-08A4K0902-01AND
2014-12-08A4K2089-01AND
2014-12-08A4K2091-01AND
2014-12-10A4J2315-01AND
2015-01-05A4L2527-01AND
2015-01-09A4L2604-01AND
2015-01-09A4L2606-01AND
2015-01-09A4L2605-01AND
2015-01-16A5A0581-01AND
2015-01-16A5A0580-01AND
2015-01-23A4K2092-01AND
2015-01-30A5A1899-01AND
2015-02-06A4K1800-01AND
2015-02-10A5A1960-01AND
2015-03-16201503180512AMND
2015-03-25201503270230AMND
2015-03-25201503270216AMND
2015-04-07201504090619AMND
2015-04-30201505050050AMND
2015-04-30201505050059AMND
2015-05-05201505070535AMND
2015-05-11201505130583AMND
2015-05-11201505130595AMND
2015-05-11201505130470AMND
2015-06-09201506120274AMND
2015-06-09201506120191AMND
2015-06-23201506250429AMND
2015-07-27201507290576AMND
2015-08-25201508280055AMND
2015-08-25201508280068AMND
2015-08-25201508280213AMND
2015-08-25201508280106AMND
2015-08-25201509010621AMND
2015-09-03201509090380AMND
2015-09-29201510020549AMND
2015-09-30201510020494AMND
2015-09-30201510020603AMND
2015-10-05201510090401AMND
2015-10-05201510090192AMND
2015-10-06201510090454AMND
2015-10-15201510220445AMND
2015-10-20201510220427AMND
2015-10-27201510290304AMND
2015-10-29201511050555AMND
2015-11-02201511060301AMND
2015-11-09201511130076AMND
2016-01-15201601200775AMND
2016-02-12201602170821AMND
2016-02-12201602170681AMND