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EWG's Tap Water Database — 2021 UPDATE

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Perfluorononanoic acid (PFNA)

California American Water Company - Suburban

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

 

111

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND200ND
2015ND200ND
2016N/A00N/A
2017ND270ND
2018N/A00N/A
2019ND440ND

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
2014-10-0627313301ND
2014-10-0627148101ND
2014-10-0627147701ND
2014-10-0627147901ND
2014-10-0627147801ND
2014-10-0627484301ND
2014-10-0627148401ND
2014-10-0627147201ND
2014-10-0627313901ND
2014-10-0827148201ND
2014-10-0827147401ND
2014-10-0827147601ND
2014-10-0827147301ND
2014-10-0827313701ND
2014-10-0827314201ND
2014-10-1527148301ND
2014-10-1527313601ND
2014-10-1527314001ND
2014-10-1527314101ND
2014-10-2327313401ND
2015-04-0628697901ND
2015-04-0628697801ND
2015-04-0628698001ND
2015-04-0628698401ND
2015-04-0628698301ND
2015-04-0628698201ND
2015-04-0628698901ND
2015-04-0728697401ND
2015-04-0728697301ND
2015-04-0728697501ND
2015-04-0728699001ND
2015-04-0728699101ND
2015-04-0828698501ND
2015-04-0928697201ND
2015-04-0928699201ND
2015-04-1528698701ND
2015-04-2328697601ND
2015-07-0829299501ND
2015-07-3029268601ND
2015-09-1628698601ND
2017-09-195810-010-1420ND
2017-09-195810-064-1520ND
2017-09-195810-066-1520ND
2017-09-205810-010-1055ND
2017-09-205810-064-1112ND
2017-09-205810-066-1118ND
2017-09-215810-010-1303ND
2017-09-215810-064-1319ND
2017-09-215810-066-1324ND
2017-09-225810-010-1143ND
2017-09-225810-064-1158ND
2017-09-225810-066-1203ND
2017-09-235810-010-1228ND
2017-09-235810-064-1143ND
2017-09-235810-066-1248ND
2017-09-265810-010-1328ND
2017-09-265810-064-1343ND
2017-09-265810-066-1348ND
2017-10-035810-010-0730ND
2017-10-035810-064-0745ND
2017-10-035810-066-0750ND
2017-10-105810-010-1442ND
2017-10-105810-064-1500ND
2017-10-105810-066-1505ND
2017-10-175810-010-1342ND
2017-10-175810-064-1357ND
2017-10-175810-066-1402ND
2019-05-139590-021-0930ND
2019-05-159590-013-0945ND
2019-06-041225-019-1040ND
2019-06-171225-006-1215ND
2019-06-181225-010-1135ND
2019-08-071225-019-1110ND
2019-08-081225-021-1200ND
2019-08-121225-006-1410ND
2019-08-121225-013-1240ND
2019-08-141225-010-1230ND
2019-09-111225-064-1245ND
2019-09-111225-066-1255ND
2019-10-161225-010-1735ND
2019-10-161225-064-1811ND
2019-10-161225-066-1840ND
2019-11-041225-010-1215ND
2019-11-041225-063-1231ND
2019-11-041225-064-1243ND
2019-11-041225-065-1259ND
2019-11-041225-066-1314ND
2019-11-111225-004-1748ND
2019-11-111225-005-1640ND
2019-11-111225-008-1315ND
2019-11-111225-011-1157ND
2019-11-111225-012-1220ND
2019-11-111225-014-1420ND
2019-11-111225-016-1637ND
2019-11-111225-018-1505ND
2019-11-111225-020-1340ND
2019-11-111225-044-1517ND
2019-11-111225-049-1355ND
2019-11-111225-051-1305ND
2019-11-121225-001-1210ND
2019-11-121225-007-1300ND
2019-11-121225-009-1430ND
2019-11-121225-019-1533ND
2019-11-121225-021-1407ND
2019-11-121225-050-1532ND
2019-11-121225-053-1105ND
2019-11-131225-006-1233ND
2019-11-131225-013-1427ND
2019-11-141225-017-1533ND
2019-12-091225-013-1530ND
2019-12-091225-021-1416ND