Perfluorononanoic acid (PFNA)
City of Spokane
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 |
|---|---|---|---|---|
| 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 | N/A | 0 | 0 | N/A |
| 2023 | ND | 11 | 0 | ND |
| 2024 | ND | 10 | 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 |
|---|---|---|
| 2023-03-20 | 4429397 | ND |
| 2023-03-20 | 4429398 | ND |
| 2023-03-20 | 4429399 | ND |
| 2023-03-22 | 4429395 | ND |
| 2023-03-22 | 4429396 | ND |
| 2023-03-22 | 4429394 | ND |
| 2023-04-25 | 4510967 | ND |
| 2023-04-25 | 4510968 | ND |
| 2023-07-25 | 4507771 | ND |
| 2023-09-25 | 4524715 | ND |
| 2023-10-24 | 4539391 | ND |
| 2024-02-20 | WEB0707-04 | ND |
| 2024-02-20 | WEB0707-03 | ND |
| 2024-02-20 | WEB0707-02 | ND |
| 2024-02-20 | WEB0707-01 | ND |
| 2024-04-23 | WED1017-01 | ND |
| 2024-07-17 | WEG0740-01 | ND |
| 2024-08-27 | WEH1233-01 | ND |
| 2024-08-27 | WEH1233-03 | ND |
| 2024-08-27 | WEH1233-02 | ND |
| 2024-08-27 | WEH1233-05 | ND |