Know Your Environment. Protect Your Health.

Perfluorononanoic acid (PFNA)

King County Water District #49

NOTE: King County Water District #49 purchases water from Seattle Public Utilities which is required to test for perfluorononanoic acid (pfna). Sample information shown below was taken by Seattle Public Utilities.

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.

 

8

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
2021N/A00N/A
2022N/A00N/A
2023ND40ND

ppt = parts per trillion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.006 ppt

The EWG Health Guideline of 6 ppt for perfluorononanoic acid was defined by EPA recommended application of the toxicity value for PFDA published in the Integrated Risk Information System’s toxicological review . This health guideline harm to the immune system and harm to fetal growth and child development.

EPA Maximum Contaminant
Level (MCL): 10 ppt

ppt = parts per trillion

All test results

NOTE: King County Water District #49 purchases water from Seattle Public Utilities which is required to test for perfluorononanoic acid (pfna). Sample information shown below was taken by Seattle Public Utilities.

Date Lab ID Result
2023-06-274569036ND
2023-06-274569033ND
2023-07-184569037ND
2023-07-184569044ND
2023-10-244569038ND
2023-10-244569042ND
2023-12-184583988ND
2023-12-184583989ND