Perfluorononanoic acid (PFNA)
Regional Water Authority
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 |
|---|---|---|---|---|
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 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 | N/A | 0 | 0 | N/A |
| 2023 | ND | 15 | 0 | ND |
| 2024 | ND | 15 | 0 | ND |
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 |
|---|---|---|
| 2023-09-18 | 67914701 | ND |
| 2023-09-18 | 67914001 | ND |
| 2023-09-18 | 67914101 | ND |
| 2023-09-18 | 67914401 | ND |
| 2023-09-18 | 67914301 | ND |
| 2023-09-18 | 67914201 | ND |
| 2023-09-19 | 67915101 | ND |
| 2023-09-19 | 67914901 | ND |
| 2023-09-20 | 67914801 | ND |
| 2023-09-27 | 67914601 | ND |
| 2023-11-27 | 68847201 | ND |
| 2023-12-13 | 68756001 | ND |
| 2023-12-13 | 68755901 | ND |
| 2023-12-13 | 68755801 | ND |
| 2023-12-13 | 68755701 | ND |
| 2024-03-18 | 69472901 | ND |
| 2024-03-18 | 69472801 | ND |
| 2024-03-18 | 69473101 | ND |
| 2024-03-18 | 69473001 | ND |
| 2024-03-18 | 69473501 | ND |
| 2024-03-18 | 69472701 | ND |
| 2024-03-18 | 69473401 | ND |
| 2024-03-19 | 69473701 | ND |
| 2024-03-19 | 69473201 | ND |
| 2024-03-20 | 69473601 | ND |
| 2024-03-20 | 69473301 | ND |
| 2024-06-11 | 70421001 | ND |
| 2024-06-11 | 70420901 | ND |
| 2024-06-11 | 70420801 | ND |
| 2024-06-11 | 70421101 | ND |