Perfluorononanoic acid (PFNA)
Silverdale Water District 16
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 | 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 |
|---|---|---|
| 2023-02-01 | 4407939 | ND |
| 2023-02-01 | 4407940 | ND |
| 2023-02-01 | 4407943 | ND |
| 2023-02-01 | 4407941 | ND |
| 2023-02-01 | 4407934 | ND |
| 2023-02-01 | 4407935 | ND |
| 2023-02-01 | 4407936 | ND |
| 2023-02-01 | 4407938 | ND |
| 2023-02-01 | 4407942 | ND |
| 2023-02-01 | 4407937 | ND |
| 2023-10-16 | 4540125 | ND |
| 2024-04-23 | 380-93110-1 | ND |
| 2024-04-23 | 380-93110-2 | ND |
| 2024-04-23 | 380-93110-3 | ND |
| 2024-04-23 | 380-93110-4 | ND |
| 2024-04-23 | 380-93110-5 | ND |
| 2024-04-23 | 380-93110-6 | ND |
| 2024-04-23 | 380-93110-7 | ND |
| 2024-04-29 | 380-93589-1 | ND |
| 2024-04-29 | 380-93589-2 | ND |
| 2024-04-29 | 380-93589-3 | ND |