Perfluorononanoic acid (PFNA)
Alpine Estates
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 | N/A | 0 | 0 | N/A |
| 2022 | 1.23 ppt | 3 | 3 | 1.000 ppt - 1.50 ppt |
| 2023 | 0.767 ppt | 3 | 2 | ND - 1.20 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 | Lab ID | Result |
|---|---|---|
| 2022-06-29 | 22G0194-01-PFAS | 1.20 ppt |
| 2022-09-12 | 22I0610-01-PFAS | 1.50 ppt |
| 2022-12-12 | 22L1813-01-PFAS | 1.000 ppt |
| 2023-02-27 | 23C0130-01-PFAS | 1.20 ppt |
| 2023-06-12 | 23F1570-01-PFAS | 1.10 ppt |
| 2023-08-14 | 23H2033-01-PFAS | ND |