Perfluorononanoic acid (PFNA)
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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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 8 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 2 | 0 | ND |
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 | Lab ID | Result |
|---|---|---|
| 2019-02-25 | 4208514 | ND |
| 2019-02-25 | 4208664 | ND |
| 2019-06-06 | 4317745 | ND |
| 2019-06-06 | 4317747 | ND |
| 2019-08-05 | 4375645 | ND |
| 2019-08-05 | 4375646 | ND |
| 2019-11-21 | 4495844 | ND |
| 2019-11-21 | 4495846 | ND |
| 2020-03-04 | 4580061 | ND |
| 2020-03-04 | 4580066 | ND |
| 2021-02-22 | 4839480 | ND |
| 2021-02-22 | 4839494 | ND |
| 2022-02-03 | 810-13977-1 | ND |
| 2022-02-03 | 810-13984-1 | ND |
| 2023-01-04 | 810-49392-1 | ND |
| 2023-01-04 | 810-49389-1 | ND |