Perfluorononanoic acid (PFNA)
Stillwater
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 | ND | 3 | 0 | ND |
| 2014 | ND | 3 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 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 | 0.291 ppt | 11 | 2 | ND - 1.70 ppt |
| 2022 | 0.664 ppt | 8 | 4 | ND - 1.70 ppt |
| 2023 | 0.349 ppt | 21 | 6 | ND - 1.70 ppt |
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 |
|---|---|---|
| 2013-12-19 | K1313958-003 | ND |
| 2013-12-19 | K1313958-001 | ND |
| 2013-12-19 | K1313958-005 | ND |
| 2014-06-05 | K1405928-003 | ND |
| 2014-06-05 | K1405928-001 | ND |
| 2014-06-05 | K1405928-005 | ND |
| 2015-07-21 | K1508072-001 | ND |
| 2015-12-09 | K1514271-001 | ND |
| 2021-09-16 | 21I0825-02 | ND |
| 2021-09-16 | 21I0825-01 | ND |
| 2021-09-16 | 21I0825-03 | 1.70 ppt |
| 2021-09-16 | 21I0825-04 | ND |
| 2021-09-16 | 21I0825-05 | ND |
| 2021-09-16 | 21I0825-06 | ND |
| 2021-09-16 | 21I0825-07 | ND |
| 2021-09-16 | 21I0825-08 | ND |
| 2021-09-16 | 21I0825-09 | ND |
| 2021-11-30 | 21K1448-02 | ND |
| 2021-11-30 | 21K1448-01 | 1.50 ppt |
| 2022-03-29 | 22C1157-01 | 1.50 ppt |
| 2022-05-10 | 22E0781-01 | 1.50 ppt |
| 2022-11-22 | 22K1024-06 | ND |
| 2022-11-22 | 22K1024-01 | 1.70 ppt |
| 2022-11-22 | 22K1024-02 | ND |
| 2022-11-22 | 22K1024-03 | 0.610 ppt |
| 2022-11-22 | 22K1024-04 | ND |
| 2022-11-22 | 22K1024-05 | ND |
| 2023-03-07 | 23C0417-01 | 1.60 ppt |
| 2023-03-07 | 23C0417-02 | ND |
| 2023-03-07 | 23C0417-03 | 0.390 ppt |
| 2023-03-07 | 23C0417-04 | ND |
| 2023-03-07 | 23C0417-05 | ND |
| 2023-03-07 | 23C0417-06 | ND |
| 2023-04-27 | 23D1689-05 | ND |
| 2023-04-27 | 23D1689-01 | ND |
| 2023-04-27 | 23D1689-02 | ND |
| 2023-04-27 | 23D1689-03 | ND |
| 2023-04-27 | 23D1689-07 | 1.50 ppt |
| 2023-04-27 | 23D1689-04 | ND |
| 2023-08-16 | 23H1904-07 | 1.70 ppt |
| 2023-08-16 | 23H1904-05 | ND |
| 2023-08-16 | 23H1904-04 | ND |
| 2023-08-16 | 23H1904-03 | ND |
| 2023-08-16 | 23H1904-02 | 0.440 ppt |
| 2023-08-16 | 23H1904-01 | ND |
| 2023-11-13 | 23K0620-01 | 1.70 ppt |
| 2023-11-13 | 23K0620-02 | ND |
| 2023-11-13 | 23K0620-03 | ND |