Perfluorononanoic acid (PFNA)
Twin Lakes Water Works Corporation
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 | 0.143 ppt | 12 | 1 | ND - 1.71 ppt |
| 2022 | 0.242 ppt | 13 | 2 | ND - 1.61 ppt |
| 2023 | 0.327 ppt | 9 | 3 | ND - 1.02 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 |
|---|---|---|
| 2021-05-21 | CI37084-PFAS | ND |
| 2021-05-21 | CI37083-PFAS | ND |
| 2021-05-21 | CI37085-PFAS | ND |
| 2021-07-29 | CI87333-PFAS | ND |
| 2021-08-24 | CJ16362-PFAS | ND |
| 2021-08-24 | CJ16360-PFAS | 1.71 ppt |
| 2021-08-24 | CJ16361-PFAS | ND |
| 2021-09-27 | CJ45031-PFAS | ND |
| 2021-11-11 | CJ76209-PFAS | ND |
| 2021-11-11 | CJ769210-PFAS | ND |
| 2021-11-11 | CJ76211-PFAS | ND |
| 2021-12-02 | CJ89056-PFAS | ND |
| 2022-03-11 | CK84967-PFAS | ND |
| 2022-03-11 | CK84966-PFAS | ND |
| 2022-03-11 | CK84968-PFAS | ND |
| 2022-04-21 | CL15114-PFAS | 1.61 ppt |
| 2022-06-07 | CL51783-PFAS | ND |
| 2022-06-07 | CL51782-PFAS | ND |
| 2022-06-30 | CL68842-PFAS | ND |
| 2022-08-16 | CM34070-PFAS | 1.54 ppt |
| 2022-09-16 | CM34071-PFAS | ND |
| 2022-10-07 | CM51791-PFAS | ND |
| 2022-11-14 | CM84804-PFAS | ND |
| 2022-11-14 | CM84803-PFAS | ND |
| 2022-12-02 | CM96447-PFAS | ND |
| 2023-01-05 | CN18603-PFAS | ND |
| 2023-02-19 | CN46525-PFAS | ND |
| 2023-02-19 | CN46526-PFAS | ND |
| 2023-05-10 | CO02847-PFAS | ND |
| 2023-05-10 | CO02846-PFAS | 1.02 ppt |
| 2023-09-25 | CP08627-PFAS | ND |
| 2023-09-25 | CP08626-PFAS | 0.953 ppt |
| 2023-11-30 | CP57089-PFAS | ND |
| 2023-11-30 | CP57090-PFAS | 0.969 ppt |