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EWG's Tap Water Database — 2021 UPDATE

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Perfluorononanoic acid (PFNA)

City of Sherman

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
2014ND180ND
2015ND20ND
2016N/A00N/A
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
2014-03-24Q1409267001ND
2014-03-24Q1409267007ND
2014-03-24Q1409267005ND
2014-03-31Q1410032005ND
2014-03-31Q1410032003ND
2014-03-31Q1410032001ND
2014-04-22Q1412615001ND
2014-06-16Q1421201001ND
2014-09-29Q1448928013ND
2014-09-29Q1448928017ND
2014-09-29Q1448928015ND
2014-09-29Q1448928001ND
2014-09-29Q1448928009ND
2014-09-29Q1448928011ND
2014-09-29Q1448928007ND
2014-09-29Q1448928003ND
2014-09-29Q1448928005ND
2014-12-29Q1460911001ND
2015-04-23Q1515129001ND
2015-04-23Q1515129003ND