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EWG's Tap Water Database — 2019 UPDATE

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Perfluorononanoic acid (PFNA)

Jefferson County PWSD 3

NOTE: Jefferson County PWSD 3 purchases water from Missouri American St. Louis County & St. Charles County which is required to test for perfluorononanoic acid (pfna). Sample information shown below was taken by Missouri American St. Louis County & St. Charles County.

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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013ND40ND
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/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.

ppt = parts per trillion

All test results

NOTE: Jefferson County PWSD 3 purchases water from Missouri American St. Louis County & St. Charles County which is required to test for perfluorononanoic acid (pfna). Sample information shown below was taken by Missouri American St. Louis County & St. Charles County.

Date Lab ID Result
2013-02-0521018301ND
2013-02-0521019901ND
2013-02-0521020101ND
2013-02-0621016401ND
2013-02-0621017401ND
2013-05-0921801201ND
2013-05-0921801001ND
2013-05-0921799401ND
2013-05-0921798501ND
2013-05-0921797501ND
2013-08-0823174601ND
2013-08-0823174401ND
2013-08-0823172801ND
2013-08-0823171901ND
2013-08-0823170901ND
2013-11-0523931601ND
2013-11-0523933501ND
2013-11-0623932601ND
2013-11-0623935101ND
2013-11-0623935301ND