Perfluorononanoic acid (PFNA)
Ruston 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 |
|---|---|---|---|---|
| 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 | 18 | 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 |
|---|---|---|
| 2023-01-24 | 810-51782-1 | ND |
| 2023-01-24 | 810-51789-1 | ND |
| 2023-01-24 | 810-51783-1 | ND |
| 2023-01-24 | 810-51784-1 | ND |
| 2023-01-24 | 810-51788-1 | ND |
| 2023-01-24 | 810-51785-1 | ND |
| 2023-01-24 | 810-51772-1 | ND |
| 2023-01-24 | 810-51786-1 | ND |
| 2023-02-28 | 810-55055-1 | ND |
| 2023-07-18 | 810-70258-1 | ND |
| 2023-07-18 | 810-70348-1 | ND |
| 2023-07-18 | 810-70345-1 | ND |
| 2023-07-18 | 810-70343-1 | ND |
| 2023-07-18 | 810-70339-1 | ND |
| 2023-07-18 | 810-70265-1 | ND |
| 2023-07-18 | 810-70254-1 | ND |
| 2023-07-18 | 810-70250-1 | ND |
| 2023-07-18 | 810-70243-1 | ND |