Perfluorononanoic acid (PFNA)
Mukilteo Water & Wastewater District
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 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 | 12 | 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 |
|---|---|---|
| 2023-02-23 | 380-38762-4 | ND |
| 2023-02-23 | 380-38762-5 | ND |
| 2023-02-23 | 380-38762-6 | ND |
| 2023-05-15 | 380-47670-1 | ND |
| 2023-05-15 | 380-47670-2 | ND |
| 2023-05-15 | 380-47670-3 | ND |
| 2023-08-28 | 380-60941-1 | ND |
| 2023-08-28 | 380-60941-2 | ND |
| 2023-08-28 | 380-60941-3 | ND |
| 2023-11-15 | 380-71612-1 | ND |
| 2023-11-15 | 380-71612-2 | ND |
| 2023-11-15 | 380-71612-3 | ND |