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 | ND | 2 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 6 | 0 | ND |
| 2021 | ND | 7 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | 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 |
|---|---|---|
| 2018-09-27 | GWEF1809271430KER | ND |
| 2018-09-27 | GWEF1809271400KER | ND |
| 2019-03-28 | GWEF1903280910KER | ND |
| 2019-06-19 | GWEF1906191450MK | ND |
| 2019-09-18 | GWEF1909180900MK | ND |
| 2019-12-19 | GWEF1912191000KEM | ND |
| 2020-03-26 | GWEF2003261110SK | ND |
| 2020-06-30 | GWEF2006301345MK | ND |
| 2020-10-06 | LJ27931 | ND |
| 2020-10-06 | LJ27926 | ND |
| 2020-10-06 | GWEF2010061325MK | ND |
| 2020-10-06 | GWEF2010061320MK | ND |
| 2021-03-23 | LJ48854 | ND |
| 2021-03-23 | LJ48853 | ND |
| 2021-03-23 | ND | |
| 2021-03-23 | ND | |
| 2021-04-27 | LJ53583 | ND |
| 2021-09-23 | 2109D25-01 | ND |
| 2021-10-19 | LJ85331 | ND |
| 2022-04-20 | LK09382 | ND |
| 2022-04-20 | LK09384 | ND |
| 2022-04-20 | ND | |
| 2022-04-20 | ND | |
| 2023-06-13 | ND | |
| 2023-06-13 | ND |