Perfluorononanoic acid (PFNA)
Home Gardens County Water District
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 | 0.304 ppt | 78 | 10 | ND - 3.60 ppt |
| 2020 | 0.528 ppt | 120 | 23 | ND - 4.80 ppt |
| 2021 | 0.645 ppt | 123 | 27 | ND - 4.80 ppt |
| 2022 | 0.488 ppt | 108 | 17 | ND - 4.20 ppt |
| 2023 | 0.320 ppt | 137 | 17 | ND - 3.60 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 |
|---|