Perfluorononanoic acid (PFNA)
City of Alexandria Water System
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 |
|---|---|---|---|---|
| 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 | 15 | 0 | ND |
| 2024 | ND | 2 | 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 |
|---|---|---|
| 2023-05-24 | 35802136001SE1 | ND |
| 2023-05-24 | 35802136003SE1 | ND |
| 2023-05-24 | 35802272003SE1 | ND |
| 2023-06-12 | 35806008007SE1 | ND |
| 2023-06-12 | 35806008001SE1 | ND |
| 2023-06-12 | 35806008005SE1 | ND |
| 2023-06-12 | 35806008003SE1 | ND |
| 2023-07-10 | 35812014001SE1 | ND |
| 2023-11-14 | 35841860001SE2 | ND |
| 2023-11-14 | 35841888007SE2 | ND |
| 2023-11-14 | 35841888005SE2 | ND |
| 2023-11-14 | 35841888003SE2 | ND |
| 2023-11-14 | 35841860007SE2 | ND |
| 2023-11-14 | 35841860005SE2 | ND |
| 2023-11-14 | 35841860003SE2 | ND |
| 2024-02-27 | 35863286001SE1 | ND |
| 2024-06-25 | 35888199001SE2 | ND |