Perfluorononanoic acid (PFNA)
Queen of Apostles
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 | ND | 3 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 3 | 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 |
|---|---|---|
| 2021-04-20 | 370382-01PFO | ND |
| 2021-07-13 | 373216-01-03PFO | ND |
| 2021-10-19 | 376508-01-03PFO | ND |
| 2022-03-16 | 379924-01-03PFO | ND |
| 2022-04-07 | 380542-01-03PFO | ND |
| 2022-10-21 | 22J3140-01PFO | ND |
| 2022-12-07 | 22L0855-01-03PFO | ND |
| 2023-02-02 | 23B0241-01PFO | ND |
| 2023-07-11 | 23G1136-01PFO | ND |
| 2023-12-04 | 23L0252PFO | ND |