Perfluorononanoic acid (PFNA)
Carmel Water District 3
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 | 0.272 ppt | 13 | 2 | ND - 1.98 ppt |
| 2023 | 0.883 ppt | 11 | 6 | ND - 2.13 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 |
|---|---|---|
| 2022-04-27 | CL17972 | 1.98 ppt |
| 2022-07-06 | CL71012 | ND |
| 2022-07-06 | CL71014 | ND |
| 2022-07-27 | CL90397 | ND |
| 2022-10-05 | CM50196 | ND |
| 2022-10-05 | CM50203 | 1.56 ppt |
| 2022-10-05 | CM50201 | ND |
| 2022-10-05 | CM50197 | ND |
| 2022-10-05 | CM50198 | ND |
| 2022-10-19 | CM66325 | ND |
| 2022-10-19 | CM66326 | ND |
| 2022-10-19 | CM66324 | ND |
| 2022-11-01 | CM74682 | ND |
| 2023-01-11 | CN21618 | ND |
| 2023-01-11 | CN21616 | ND |
| 2023-01-25 | CN30096 | 2.13 ppt |
| 2023-05-10 | CO02888PFAS | ND |
| 2023-05-10 | CO02886PFAS | ND |
| 2023-05-24 | CO13339PFAS | ND |
| 2023-05-24 | CO13337PFAS | 1.77 ppt |
| 2023-08-09 | CO70650PFAS | 1.63 ppt |
| 2023-08-09 | CO70648PFAS | 1.50 ppt |
| 2023-09-06 | CO91842PFAS | 1.66 ppt |
| 2023-09-06 | CO91840PFAS | 1.02 ppt |