Perfluorononanoic acid (PFNA)
Bayview Water System
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 | 8 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 3 | 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 |
|---|---|---|
| 2019-02-18 | L7097145-1 | ND |
| 2019-03-04 | L7105278-1 | ND |
| 2019-04-08 | L7108859-1 | ND |
| 2019-05-13 | L7109530-1 | ND |
| 2019-07-23 | L7131687-1 | ND |
| 2019-08-19 | L7132354-1 | ND |
| 2019-10-21 | L7159876-1 | ND |
| 2019-12-04 | L7161716-1 | ND |
| 2020-01-21 | L7178678-1 | ND |
| 2020-02-24 | L7180562-1 | ND |
| 2021-03-03 | 630-15418-1 | ND |
| 2021-03-03 | 630-15418-3 | ND |
| 2022-01-13 | 630-26169-1 | ND |
| 2022-01-13 | 630-26169-3 | ND |
| 2023-01-24 | 630-54084-1 | ND |
| 2023-01-24 | 630-54084-3 | ND |
| 2023-08-09 | 630-69051-1 | ND |