Perfluorononanoic acid (PFNA)
Kent Water District 1
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 | 0.433 ppt | 8 | 2 | ND - 1.84 ppt |
| 2022 | 0.427 ppt | 11 | 3 | ND - 1.59 ppt |
| 2023 | 0.783 ppt | 8 | 5 | ND - 1.49 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 |
|---|---|---|
| 2021-04-13 | CH99465PFAS | ND |
| 2021-04-13 | CH99466PFAS | ND |
| 2021-05-06 | CI25412PFAS | ND |
| 2021-09-17 | CJ31770 | ND |
| 2021-10-14 | CJ56222 | 1.84 ppt |
| 2021-11-30 | CJ88192 | ND |
| 2021-11-30 | CJ88191 | 1.62 ppt |
| 2021-12-29 | CK07047 | ND |
| 2022-03-11 | CK88108PFAS | ND |
| 2022-04-05 | CL10048 | 1.55 ppt |
| 2022-05-09 | CL28454 | ND |
| 2022-05-09 | CL28453 | 1.59 ppt |
| 2022-06-06 | CL51650 | 1.56 ppt |
| 2022-06-06 | CL51649 | ND |
| 2022-08-08 | CM01023 | ND |
| 2022-08-08 | CM01022 | ND |
| 2022-09-13 | CM31545 | ND |
| 2022-12-02 | CM98187 | ND |
| 2022-12-02 | CM98186 | ND |
| 2023-01-03 | CN16598 | 1.47 ppt |
| 2023-02-20 | CN47643 | ND |
| 2023-02-20 | CN47644 | ND |
| 2023-05-17 | CO08298PFAS | 0.975 ppt |
| 2023-05-17 | CO08297PFAS | ND |
| 2023-06-14 | CO28336PFAS | 1.31 ppt |
| 2023-07-27 | CO60600PFAS | 1.02 ppt |
| 2023-08-31 | CO88139PFAS | 1.49 ppt |