Perfluorononanoic acid (PFNA)
Lake Mahopac Condo
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 | 0.555 ppt | 4 | 2 | ND - 1.11 ppt |
| 2022 | 0.230 ppt | 6 | 1 | ND - 1.38 ppt |
| 2023 | 0.953 ppt | 4 | 3 | ND - 1.38 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 |
|---|---|---|
| 2021-06-03 | CI44875 | 1.11 ppt |
| 2021-08-25 | CJ15063 | ND |
| 2021-10-01 | GCJ32527 | ND |
| 2021-11-23 | CJ84586 | 1.11 ppt |
| 2022-03-07 | CK81662 | ND |
| 2022-03-07 | CK00413 | ND |
| 2022-06-02 | 3920317 | 1.38 ppt |
| 2022-08-29 | CM18438 | ND |
| 2022-09-20 | CM37881 | ND |
| 2022-11-22 | CM90908 | ND |
| 2023-02-16 | CN44500 | ND |
| 2023-06-09 | CO24576PFAS | 1.16 ppt |
| 2023-06-22 | CO35245PFAS | 1.38 ppt |
| 2023-11-01 | CP40898PFAS | 1.27 ppt |