Perfluorononanoic acid (PFNA)
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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 | ND | 2 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | 0.525 ppt | 4 | 1 | ND - 2.10 ppt |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 4 | 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 |
|---|---|---|
| 2019-06-25 | CA5200539_001_001-201906251152 | ND |
| 2019-09-16 | CA5200539_001_001-201909160955 | ND |
| 2020-09-14 | CA5200539_001_001-202009141105 | ND |
| 2020-12-14 | CA5200539_001_001-202012140852 | ND |
| 2021-03-16 | CA5200539_001_001-202103161004 | ND |
| 2021-06-15 | CA5200539_001_001-202106151021 | ND |
| 2021-09-21 | CA5200539_001_001-202109211000 | 2.10 ppt |
| 2021-12-07 | CA5200539_001_001-202112070957 | ND |
| 2022-03-29 | CA5200539_001_001-202203291012 | ND |
| 2022-06-28 | CA5200539_001_001-202206281106 | ND |
| 2022-09-27 | CA5200539_001_001-202209270948 | ND |
| 2022-12-27 | CA5200539_001_001-202212271050 | ND |
| 2023-03-16 | CA5200539_001_001-202303160743 | ND |
| 2023-06-27 | CA5200539_001_001-202306271018 | ND |
| 2023-09-21 | CA5200539_001_001-202309210826 | ND |
| 2023-12-28 | CA5200539_001_001-202312280637 | ND |