Perfluorononanoic acid (PFNA)
City of Bremerton
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | ND | 14 | 0 | ND |
| 2023 | N/A | 0 | 0 | N/A |
| 2024 | ND | 7 | 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 |
|---|---|---|
| 2022-01-31 | 4258904 | ND |
| 2022-01-31 | 4258896 | ND |
| 2022-01-31 | 4258900 | ND |
| 2022-01-31 | 4258895 | ND |
| 2022-01-31 | 4258901 | ND |
| 2022-01-31 | 4258906 | ND |
| 2022-01-31 | 4258902 | ND |
| 2022-01-31 | 4258905 | ND |
| 2022-02-01 | 4258899 | ND |
| 2022-02-01 | 4258899 | ND |
| 2022-02-01 | 4258899 | ND |
| 2022-02-01 | 4258899 | ND |
| 2022-04-26 | 4355131 | ND |
| 2022-04-26 | 4423655 | ND |
| 2024-07-08 | MEG0287-01 | ND |
| 2024-07-08 | MEG0270-02 | ND |
| 2024-07-08 | MEG0270-03 | ND |
| 2024-07-08 | MEG0270-04 | ND |
| 2024-07-08 | MEG0270-05 | ND |
| 2024-07-08 | MEG0270-06 | ND |
| 2024-07-10 | MEG0270-01 | ND |