Perfluorononanoic acid (PFNA)
Carmel Water District 6-shell Valley
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 | N/A | 0 | 0 | N/A |
| 2022 | ND | 4 | 0 | ND |
| 2023 | 0.194 ppt | 5 | 1 | ND - 0.970 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 |
|---|---|---|
| 2022-06-14 | CL56246 | ND |
| 2022-09-21 | CM37916 | ND |
| 2022-10-13 | CM61752 | ND |
| 2022-11-16 | CM87023 | ND |
| 2023-01-24 | CN29329 | ND |
| 2023-04-19 | CN86827PFAS | 0.970 ppt |
| 2023-05-10 | CO02867PFAS | ND |
| 2023-07-06 | CO44649PFAS | ND |
| 2023-10-17 | CP27792PFAS | ND |