Know Your Environment. Protect Your Health.

Perfluorononanoic acid (PFNA)

Twin Creeks Special Service 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.

 

39

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
2021ND20ND
20220.0120 ppt211ND - 0.260 ppt
2023ND160ND

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

Date Result
2021-07-20ND
2021-07-20ND
2022-05-11ND
2022-05-11ND
2022-05-11ND
2022-05-11ND
2022-06-13ND
2022-06-13ND
2022-07-21ND
2022-07-21ND
2022-08-30ND
2022-08-30ND
2022-09-28ND
2022-09-28ND
2022-10-25ND
2022-10-25ND
2022-10-25ND
2022-11-28ND
2022-11-28ND
2022-12-15ND
2022-12-150.260 ppt
2022-12-15ND
2022-12-15ND
2023-01-12ND
2023-01-12ND
2023-02-08ND
2023-02-08ND
2023-03-06ND
2023-03-06ND
2023-04-24ND
2023-04-24ND
2023-05-22ND
2023-05-22ND
2023-06-06ND
2023-06-06ND
2023-07-12ND
2023-07-12ND
2023-07-12ND
2023-07-12ND