Perfluorononanoic acid (PFNA)
West Sound Utility District #1
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 |
|---|---|---|---|---|
| 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 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 20 | 0 | ND |
| 2024 | ND | 8 | 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 |
|---|---|---|
| 2023-07-05 | 4480111 | ND |
| 2023-07-05 | 4480108 | ND |
| 2023-07-05 | 4480115 | ND |
| 2023-07-05 | 4480104 | ND |
| 2023-07-05 | 4480110 | ND |
| 2023-07-05 | 4480109 | ND |
| 2023-07-05 | 4480109 | ND |
| 2023-07-05 | 4480113 | ND |
| 2023-07-05 | 4480113 | ND |
| 2023-07-05 | 4480113 | ND |
| 2023-07-05 | 4480106 | ND |
| 2023-07-05 | 4480106 | ND |
| 2023-11-15 | 4548804 | ND |
| 2023-12-20 | 380-76081-2 | ND |
| 2023-12-20 | 380-76089-1 | ND |
| 2023-12-20 | 380-76089-3 | ND |
| 2023-12-20 | 380-76087-1 | ND |
| 2023-12-20 | 380-76089-2 | ND |
| 2023-12-20 | 380-76087-2 | ND |
| 2023-12-20 | 380-76081-1 | ND |
| 2024-06-25 | 380-101456-1 | ND |
| 2024-06-25 | 380-101456-5 | ND |
| 2024-06-25 | 380-101466-1 | ND |
| 2024-06-25 | 380-101456-4 | ND |
| 2024-06-25 | 380-101456-3 | ND |
| 2024-06-25 | 380-101456-2 | ND |
| 2024-07-29 | 380-106285-1 | ND |
| 2024-07-29 | 380-106289-1 | ND |