Perfluorononanoic acid (PFNA)
Portland
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 | ND | 4 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 13 | 0 | ND |
| 2022 | 0.250 ppt | 8 | 2 | ND - 1.000 ppt |
| 2023 | ND | 4 | 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 |
|---|---|---|
| 2018-09-25 | GWEF1809251340KER | ND |
| 2018-09-25 | GWEF1809251300KER | ND |
| 2018-09-25 | GWNT1809251245KER | ND |
| 2018-09-25 | GWEF1809251320KER | ND |
| 2021-01-19 | LJ41588 | ND |
| 2021-01-19 | LJ41587 | ND |
| 2021-01-19 | LJ41589 | ND |
| 2021-01-19 | LJ41586 | ND |
| 2021-03-25 | LJ49125 | ND |
| 2021-03-25 | ND | |
| 2021-09-14 | ND | |
| 2021-09-14 | LJ78179 | ND |
| 2021-09-14 | ND | |
| 2021-09-14 | ND | |
| 2021-09-14 | LJ78178 | ND |
| 2021-09-14 | LJ78177 | ND |
| 2021-09-14 | LJ78176 | ND |
| 2022-08-23 | LK29741 | ND |
| 2022-08-23 | LK29739 | ND |
| 2022-08-23 | LK29742 | ND |
| 2022-08-23 | LK29740 | 1.000 ppt |
| 2022-08-23 | ND | |
| 2022-08-23 | 1.000 ppt | |
| 2022-08-23 | ND | |
| 2022-08-23 | ND | |
| 2023-09-18 | ND | |
| 2023-09-18 | ND | |
| 2023-09-18 | ND | |
| 2023-09-18 | ND |