Perfluorononanoic acid (PFNA)
Oakdale
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 |
|---|---|---|---|---|
| 2015 | ND | 12 | 0 | ND |
| 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 | 0.333 ppt | 3 | 1 | ND - 1.000 ppt |
| 2022 | 0.0700 ppt | 8 | 1 | ND - 0.560 ppt |
| 2023 | ND | 8 | 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 |
|---|---|---|
| 2015-01-05 | K1500180-005 | ND |
| 2015-01-05 | K1500180-001 | ND |
| 2015-01-05 | K1500180-003 | ND |
| 2015-01-05 | K1500180-009 | ND |
| 2015-01-05 | K1500180-011 | ND |
| 2015-01-05 | K1500180-007 | ND |
| 2015-07-14 | K1507875-005 | ND |
| 2015-07-14 | K1507875-001 | ND |
| 2015-07-14 | K1507875-003 | ND |
| 2015-07-14 | K1507875-009 | ND |
| 2015-07-14 | K1507875-011 | ND |
| 2015-07-14 | K1507875-007 | ND |
| 2021-02-23 | 21B1194-02 | ND |
| 2021-02-23 | 21B1194-01 | 1.000 ppt |
| 2021-02-23 | 21B1194-03 | ND |
| 2022-08-04 | 22H0440-01 | ND |
| 2022-08-04 | 22H0440-02 | ND |
| 2022-08-04 | 22H0440-03 | ND |
| 2022-08-04 | 22H0440-04 | ND |
| 2022-08-04 | 22H0440-05 | 0.560 ppt |
| 2022-08-04 | 22H0440-06 | ND |
| 2022-12-29 | 22L1156-01 | ND |
| 2022-12-29 | 22L1156-02 | ND |
| 2023-06-06 | 23F0362-01 | ND |
| 2023-06-06 | 23F0362-02 | ND |
| 2023-08-22 | 23H2241-02 | ND |
| 2023-08-22 | 23H2241-06 | ND |
| 2023-08-22 | 23H2241-05 | ND |
| 2023-08-22 | 23H2241-03 | ND |
| 2023-12-28 | 23L0917-02 | ND |
| 2023-12-28 | 23L0917-01 | ND |