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EWG's Tap Water Database — 2021 UPDATE

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Perfluorononanoic acid (PFNA)

Yorba Linda Water District

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

 

54

Samples

0

Samples exceeding legal limit (MCL)

15

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND60ND
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
20191.30 ppt4815ND - 5.20 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.

EPA Maximum Contaminant
Level (MCL) 10 ppt

ppt = parts per trillion

All test results

Date Lab ID Result
2013-01-093010037805ND
2013-03-043010037806ND
2013-06-103010037806-2ND
2013-07-103010037805-2ND
2013-09-033010037806-3ND
2013-12-093010037806-4ND
2019-04-044417-008-10504.00 ppt
2019-04-044417-011-1035ND
2019-04-044417-001-0910ND
2019-04-044417-007-1200ND
2019-04-044417-012-1220ND
2019-04-044417-020-1140ND
2019-04-044417-006-1015ND
2019-04-044417-023-0935ND
2019-04-044417-024-1000ND
2019-04-044417-003-1125ND
2019-04-044417-002-11054.10 ppt
2019-05-084417-020-10204.10 ppt
2019-05-084417-023-0905ND
2019-05-084417-012-1115ND
2019-05-084417-024-0940ND
2019-05-084417-008-1030ND
2019-05-084417-011-1010ND
2019-05-084417-002-10455.20 ppt
2019-05-084417-007-0925ND
2019-05-084417-003-10554.10 ppt
2019-05-084417-006-0955ND
2019-05-234417-004-1125ND
2019-08-204417-004-1040ND
2019-08-204417-001-0915ND
2019-08-204417-002-11004.00 ppt
2019-08-204417-024-0900ND
2019-08-204417-003-1115ND
2019-08-204417-023-0820ND
2019-08-204417-020-0940ND
2019-08-204417-008-1025ND
2019-08-204417-012-1130ND
2019-08-204417-006-1000ND
2019-08-204417-007-0845ND
2019-08-204417-011-1010ND
2019-10-234417-011-09504.10 ppt
2019-10-234417-001-11304.30 ppt
2019-10-234417-008-1015ND
2019-10-234417-002-10405.10 ppt
2019-10-234417-024-0900ND
2019-10-234417-004-11154.10 ppt
2019-10-234417-006-09304.90 ppt
2019-10-234417-003-10554.00 ppt
2019-10-234417-023-0820ND
2019-10-234417-007-0840ND
2019-10-234417-020-10054.30 ppt
2019-10-234417-012-1205ND
2019-12-174417-024-09103.20 ppt
2019-12-304417-024-09302.90 ppt