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 | N/A | 0 | 0 | N/A |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 5 | 0 | ND |
| 2022 | 0.486 ppt | 7 | 1 | ND - 3.40 ppt |
| 2023 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2020-10-07 | CA0110018_004_004-202010071018 | ND |
| 2020-10-07 | CA0110018_005_005-202010071037 | ND |
| 2021-01-04 | CA0110018_005_005-202101040945 | ND |
| 2021-01-04 | CA0110018_004_004-202101040916 | ND |
| 2021-04-05 | CA0110018_005_005-202104050923 | ND |
| 2021-07-06 | CA0110018_005_005-202107060930 | ND |
| 2021-10-04 | CA0110018_005_005-202110041020 | ND |
| 2022-01-03 | CA0110018_005_005-202201031030 | ND |
| 2022-03-15 | CA0110018_004_004-202203150929 | ND |
| 2022-04-05 | CA0110018_004_004-202204051104 | ND |
| 2022-06-14 | CA0110018_005_005-202208311051 | 3.40 ppt |
| 2022-07-06 | CA0110018_004_004-202207060847 | ND |
| 2022-07-06 | CA0110018_004_004-202207060849 | ND |
| 2022-10-04 | CA0110018_004_004-202210040934 | ND |