Perfluorononanoic acid (PFNA)
East Orange County Water District - Rz
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 | 4 | 0 | ND |
| 2020 | 2.87 ppt | 3 | 3 | 2.80 ppt - 3.00 ppt |
| 2021 | 2.62 ppt | 6 | 6 | 2.10 ppt - 3.20 ppt |
| 2022 | 2.30 ppt | 3 | 3 | 2.20 ppt - 2.40 ppt |
| 2023 | 2.90 ppt | 5 | 5 | 2.70 ppt - 3.10 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 |
|---|---|---|
| 2019-04-23 | CA3010068_001_001-201904230915 | ND |
| 2019-06-04 | CA3010068_001_001-201906040840 | ND |
| 2019-09-03 | CA3010068_001_001-201909030915 | ND |
| 2019-11-05 | CA3010068_001_001-201911050940 | ND |
| 2020-01-21 | CA3010068_001_001-202001210820 | 3.00 ppt |
| 2020-10-19 | CA3010068_001_001-202010190855 | 2.80 ppt |
| 2020-10-19 | CA3010068_001_001-202010190840 | 2.80 ppt |
| 2021-03-02 | CA3010068_001_001-202103020905 | 2.60 ppt |
| 2021-03-02 | CA3010068_001_001-202103020910 | 2.70 ppt |
| 2021-05-04 | CA3010068_001_001-202105040945 | 2.90 ppt |
| 2021-05-04 | CA3010068_001_001-202105040940 | 3.20 ppt |
| 2021-08-19 | CA3010068_001_001-202108190905 | 2.10 ppt |
| 2021-10-13 | CA3010068_001_001-202110130905 | 2.20 ppt |
| 2022-01-13 | CA3010068_001_001-202201130910 | 2.20 ppt |
| 2022-04-20 | CA3010068_001_001-202204201130 | 2.30 ppt |
| 2022-08-02 | CA3010068_001_001-202208020910 | 2.40 ppt |
| 2023-01-26 | CA3010068_001_001-202301260925 | 2.70 ppt |
| 2023-01-26 | CA3010068_001_001-202301260920 | 2.80 ppt |
| 2023-04-04 | CA3010068_001_001-202304040905 | 2.90 ppt |
| 2023-08-08 | CA3010068_001_001-202308080830 | 3.10 ppt |
| 2023-11-14 | CA3010068_001_001-202311140920 | 3.00 ppt |