Perfluorononanoic acid (PFNA)
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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 | ND | 6 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 4 | 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 |
|---|---|---|
| 2019-01-22 | 4180512 | ND |
| 2019-04-16 | 4264397 | ND |
| 2019-06-21 | 4333037 | ND |
| 2019-06-21 | 4332987 | ND |
| 2019-07-17 | 4359223 | ND |
| 2019-10-16 | 4460159 | ND |
| 2020-01-15 | 4541642 | ND |
| 2021-02-08 | 4829760 | ND |
| 2021-04-19 | 4881447 | ND |
| 2021-07-22 | 4964216 | ND |
| 2021-10-12 | 202110130725 | ND |
| 2022-02-02 | 810-14067-1 | ND |
| 2022-05-06 | 810-24022-1 | ND |
| 2022-08-05 | 810-33131-1 | ND |
| 2022-10-06 | 810-40578-1 | ND |
| 2023-02-03 | 810-52532-1 | ND |
| 2023-04-06 | 810-58874-1 | ND |
| 2023-07-26 | 810-71311-1 | ND |
| 2023-10-09 | 810-80777-1 | ND |