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 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 16 | 0 | ND |
| 2023 | ND | 10 | 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 |
|---|---|---|
| 2021-12-03 | 21L0478-02 | ND |
| 2021-12-03 | 21L0478-03 | ND |
| 2021-12-03 | 21L0478-01 | ND |
| 2022-02-14 | 22B0990-01 | ND |
| 2022-02-14 | 22B0990-02 | ND |
| 2022-02-14 | 22B0990-03 | ND |
| 2022-02-14 | 22B0990-04 | ND |
| 2022-05-02 | 22E0080-01 | ND |
| 2022-05-02 | 22E0080-02 | ND |
| 2022-05-02 | 22E0080-03 | ND |
| 2022-07-07 | 22G0294-01 | ND |
| 2022-07-07 | 22G0294-02 | ND |
| 2022-07-07 | 22G0294-03 | ND |
| 2022-10-17 | 22J0645-02 | ND |
| 2022-10-17 | 22J0645-03 | ND |
| 2022-10-17 | 22J0645-01 | ND |
| 2022-11-30 | 22L0039-01 | ND |
| 2022-11-30 | 22L0039-02 | ND |
| 2022-11-30 | 22L0039-03 | ND |
| 2023-01-09 | 23A0189-01 | ND |
| 2023-01-09 | 23A0189-02 | ND |
| 2023-01-09 | 23A0189-03 | ND |
| 2023-05-04 | 23E0521-01 | ND |
| 2023-05-04 | 23E0521-02 | ND |
| 2023-05-04 | 23E0521-03 | ND |
| 2023-08-09 | 23H1381-01 | ND |
| 2023-08-09 | 23H1381-02 | ND |
| 2023-08-09 | 23H1381-03 | ND |
| 2023-12-04 | 23L0136-01 | ND |