Perfluorononanoic acid (PFNA)
Whitworth Water District 2
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 | 13 | 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 |
|---|---|---|
| 2023-10-16 | 4538492 | ND |
| 2023-10-16 | 4538490 | ND |
| 2023-10-16 | 4538491 | ND |
| 2023-10-17 | 4540090 | ND |
| 2023-10-17 | 4540082 | ND |
| 2023-10-17 | 4540099 | ND |
| 2023-10-18 | 4540076 | ND |
| 2023-10-18 | 4540071 | ND |
| 2023-10-23 | 4539354 | ND |
| 2023-10-23 | 4539605 | ND |
| 2023-10-23 | 4539355 | ND |
| 2023-10-24 | 4538610 | ND |
| 2023-10-24 | 4538611 | ND |
| 2024-01-22 | WEA0608-01 | ND |
| 2024-04-01 | WED0034-01 | ND |
| 2024-04-01 | WED0034-02 | ND |
| 2024-04-01 | WED0034-03 | ND |
| 2024-04-02 | WED0144-01 | ND |
| 2024-04-02 | WED0144-03 | ND |
| 2024-04-02 | WED0144-02 | ND |
| 2024-04-10 | WED0494-01 | ND |
| 2024-04-10 | WED0494-02 | ND |
| 2024-07-01 | WEG0044-01 | ND |