Perfluorononanoic acid (PFNA)
Hamilton Water Department
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 | 0.720 ppt | 2 | 2 | 0.440 ppt - 1.000 ppt |
| 2022 | 0.470 ppt | 18 | 12 | ND - 1.000 ppt |
| 2023 | 0.505 ppt | 15 | 9 | ND - 1.17 ppt |
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 |
|---|---|
| 2021-10-21 | 0.440 ppt |
| 2021-10-21 | 1.000 ppt |
| 2022-02-08 | ND |
| 2022-02-08 | ND |
| 2022-02-08 | ND |
| 2022-02-08 | 0.500 ppt |
| 2022-02-08 | 1.000 ppt |
| 2022-02-08 | ND |
| 2022-02-08 | ND |
| 2022-03-08 | 0.780 ppt |
| 2022-04-21 | 0.950 ppt |
| 2022-04-21 | ND |
| 2022-05-17 | 0.890 ppt |
| 2022-06-15 | 0.660 ppt |
| 2022-07-12 | 0.600 ppt |
| 2022-07-12 | 0.420 ppt |
| 2022-09-13 | 0.710 ppt |
| 2022-10-11 | 0.410 ppt |
| 2022-10-11 | 0.630 ppt |
| 2022-12-14 | 0.905 ppt |
| 2023-01-11 | 0.426 ppt |
| 2023-02-06 | 0.538 ppt |
| 2023-03-20 | 0.586 ppt |
| 2023-04-04 | 0.769 ppt |
| 2023-04-04 | ND |
| 2023-05-15 | ND |
| 2023-05-15 | ND |
| 2023-06-05 | 1.17 ppt |
| 2023-08-30 | 1.14 ppt |
| 2023-09-12 | 1.05 ppt |
| 2023-10-02 | ND |
| 2023-10-02 | ND |
| 2023-10-10 | 1.03 ppt |
| 2023-11-14 | ND |
| 2023-12-11 | 0.866 ppt |