Perfluorononanoic acid (PFNA)
Jennie Clarkson Home
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 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | 2.18 ppt | 6 | 3 | ND - 5.55 ppt |
| 2022 | 3.27 ppt | 10 | 8 | ND - 5.85 ppt |
| 2023 | 2.32 ppt | 9 | 6 | ND - 5.88 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 |
|---|---|---|
| 2021-06-01 | L212915001-PFAS | 3.14 ppt |
| 2021-06-01 | L212915002-PFAS | ND |
| 2021-09-28 | L215269801-PFAS | ND |
| 2021-10-19 | L215729102-PFAS | ND |
| 2021-10-19 | L215729101-PFAS | 4.40 ppt |
| 2021-12-03 | L216687302-PFAS | 5.55 ppt |
| 2022-02-20 | L220912502-PFAS | ND |
| 2022-02-20 | L220912501-PFAS | 4.69 ppt |
| 2022-03-20 | L221468501-PFAS | 4.99 ppt |
| 2022-06-19 | L2232813-01-PFAS | 4.83 ppt |
| 2022-06-19 | L2232813-02-PFAS | ND |
| 2022-06-26 | L2234236-01-PFAS | 4.92 ppt |
| 2022-09-07 | L2248718-02-PFAS | 0.750 ppt |
| 2022-09-07 | L2248718-01-PFAS | 5.57 ppt |
| 2022-10-02 | L2254424-01-PFAS | 5.85 ppt |
| 2022-12-22 | L2272353-01-PFAS | 1.07 ppt |
| 2023-01-10 | L2301675-01-PFAS | 5.88 ppt |
| 2023-01-10 | L2301675-02-PFAS | 1.17 ppt |
| 2023-03-07 | L2312366-01-PFAS | 5.00 ppt |
| 2023-03-07 | L2312366-02-PFAS | ND |
| 2023-06-14 | L2335485-02-PFAS | 3.88 ppt |
| 2023-06-14 | L2335485-01-PFAS | ND |
| 2023-09-28 | L2358237-01-PFAS | 1.14 ppt |
| 2023-11-08 | CP44013-PFAS | ND |
| 2023-11-28 | CP56012-PFAS | 3.85 ppt |