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EWG's Tap Water Database — 2021 UPDATE

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Perfluorononanoic acid (PFNA)

Devens Massdevelopment

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.

 

155

Samples

0

Samples exceeding legal limit (MCL)

21

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015N/A00N/A
20167.03 ppt75ND - 21.0 ppt
20171.75 ppt86ND - 2.50 ppt
20180.293 ppt152ND - 2.20 ppt
20190.148 ppt1258ND - 2.73 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.

ppt = parts per trillion

All test results

Date Result
2016-07-2821.0 ppt
2016-07-2821.0 ppt
2016-09-012.00 ppt
2016-09-01ND
2016-09-01ND
2016-12-282.60 ppt
2016-12-282.60 ppt
2017-02-222.50 ppt
2017-02-222.50 ppt
2017-05-162.20 ppt
2017-05-162.20 ppt
2017-09-192.30 ppt
2017-09-192.30 ppt
2017-12-19ND
2017-12-19ND
2018-02-27ND
2018-02-272.20 ppt
2018-02-272.20 ppt
2018-05-14ND
2018-05-14ND
2018-05-14ND
2018-05-14ND
2018-08-03ND
2018-08-03ND
2018-08-03ND
2018-08-03ND
2018-10-25ND
2018-10-25ND
2018-10-25ND
2018-10-25ND
2019-02-20ND
2019-02-20ND
2019-02-20ND
2019-02-20ND
2019-05-21ND
2019-05-21ND
2019-05-212.29 ppt
2019-05-21ND
2019-05-21ND
2019-08-02ND
2019-08-02ND
2019-08-02ND
2019-08-20ND
2019-08-20ND
2019-08-20ND
2019-08-20ND
2019-08-20ND
2019-09-03ND
2019-09-03ND
2019-09-03ND
2019-09-03ND
2019-09-03ND
2019-09-03ND
2019-09-03ND
2019-09-03ND
2019-09-03ND
2019-09-18ND
2019-09-18ND
2019-09-18ND
2019-09-18ND
2019-09-18ND
2019-09-18ND
2019-09-18ND
2019-09-18ND
2019-09-25ND
2019-09-252.59 ppt
2019-09-25ND
2019-09-25ND
2019-10-02ND
2019-10-02ND
2019-10-02ND
2019-10-02ND
2019-10-02ND
2019-10-02ND
2019-10-02ND
2019-10-02ND
2019-10-02ND
2019-10-09ND
2019-10-092.73 ppt
2019-10-09ND
2019-10-09ND
2019-10-09ND
2019-10-09ND
2019-10-15ND
2019-10-15ND
2019-10-15ND
2019-10-15ND
2019-10-15ND
2019-10-15ND
2019-10-15ND
2019-10-15ND
2019-10-15ND
2019-10-23ND
2019-10-232.51 ppt
2019-10-23ND
2019-10-23ND
2019-10-30ND
2019-10-30ND
2019-10-30ND
2019-10-30ND
2019-10-30ND
2019-10-30ND
2019-10-30ND
2019-10-30ND
2019-10-30ND
2019-11-06ND
2019-11-062.32 ppt
2019-11-06ND
2019-11-06ND
2019-11-06ND
2019-11-06ND
2019-11-13ND
2019-11-13ND
2019-11-13ND
2019-11-13ND
2019-11-13ND
2019-11-13ND
2019-11-13ND
2019-11-13ND
2019-11-13ND
2019-11-20ND
2019-11-201.63 ppt
2019-11-20ND
2019-11-20ND
2019-11-25ND
2019-11-25ND
2019-11-25ND
2019-11-25ND
2019-11-25ND
2019-11-25ND
2019-11-25ND
2019-11-25ND
2019-11-25ND
2019-12-04ND
2019-12-042.06 ppt
2019-12-04ND
2019-12-04ND
2019-12-04ND
2019-12-04ND
2019-12-11ND
2019-12-11ND
2019-12-11ND
2019-12-18ND
2019-12-182.38 ppt
2019-12-18ND
2019-12-18ND
2019-12-23ND
2019-12-23ND
2019-12-23ND
2019-12-23ND
2019-12-23ND
2019-12-23ND
2019-12-23ND
2019-12-23ND
2019-12-23ND