Perfluorononanoic acid (PFNA)
Cloquet
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 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 | ND | 7 | 0 | ND |
| 2022 | 0.130 ppt | 3 | 1 | ND - 0.390 ppt |
| 2023 | ND | 7 | 0 | ND |
| 2024 | 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 |
|---|---|---|
| 2021-09-21 | 21I1146-01 | ND |
| 2021-09-21 | 21I1146-02 | ND |
| 2021-09-21 | 21I1146-03 | ND |
| 2021-09-21 | 21I1146-04 | ND |
| 2021-09-21 | 21I1144-01 | ND |
| 2021-12-15 | 21L0722-01 | ND |
| 2021-12-15 | 21L0722-02 | ND |
| 2022-03-22 | 22C0993-01 | ND |
| 2022-06-15 | 22F1016-01 | ND |
| 2022-12-06 | 22L0244-01 | 0.390 ppt |
| 2023-06-06 | 23F0488-01 | ND |
| 2023-09-07 | 23I0302-01 | ND |
| 2023-09-07 | 32303086-1 | ND |
| 2023-09-07 | 32303086-3 | ND |
| 2023-09-07 | 32303086-5 | ND |
| 2023-09-07 | 32303086-7 | ND |
| 2023-10-17 | 23J0910-01 | ND |
| 2024-03-11 | 32400699003 | ND |
| 2024-03-11 | 32400699007 | ND |
| 2024-03-11 | 32400699005 | ND |
| 2024-03-11 | 32400699001 | ND |