Perfluorononanoic acid (PFNA)
California Water Service Company Las Lomas
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 | 4 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 6 | 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 |
|---|---|---|
| 2020-05-04 | CA2710013_003_003-202005041115 | ND |
| 2020-05-04 | CA2710013_004_004-202005041155 | ND |
| 2020-05-04 | CA2710013_009_009-202005041201 | ND |
| 2020-05-07 | CA2710013_001_001-202005071130 | ND |
| 2023-08-01 | CA2710013_004_004-202308011151 | ND |
| 2023-08-01 | CA2710013_004_004-202308011148 | ND |
| 2023-10-19 | CA2710013_003_003-202310191002 | ND |
| 2023-11-15 | CA2710013_003_003-202311151141 | ND |
| 2023-11-21 | CA2710013_001_001-202311211356 | ND |
| 2023-11-21 | CA2710013_001_001-202311211355 | ND |