Perfluorononanoic acid (PFNA)
Burbank Irrigation District 4
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 |
|---|---|---|---|---|
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | 1.03 ppt | 2 | 1 | ND - 2.05 ppt |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | 2.32 ppt | 3 | 2 | ND - 3.71 ppt |
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 |
|---|---|---|
| 2021-10-13 | 4231790 | ND |
| 2021-10-13 | 4231789 | 2.05 ppt |
| 2023-03-23 | 4429223 | 3.25 ppt |
| 2023-06-26 | 4499148 | ND |
| 2023-12-18 | 4560262 | 3.71 ppt |