Perfluorononanoic acid (PFNA)
Town of Hampstead
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | N/A | 0 | 0 | N/A |
| 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 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 22 | 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 |
|---|---|---|
| 2023-02-07 | 101013P | ND |
| 2023-02-07 | 101023P | ND |
| 2023-02-07 | 101014P | ND |
| 2023-02-07 | 101022P | ND |
| 2023-02-07 | 101016P | ND |
| 2023-02-07 | 101021P | ND |
| 2023-02-07 | 101018P | ND |
| 2023-02-07 | 101012P | ND |
| 2023-02-07 | 101019P | ND |
| 2023-02-07 | 101020P | ND |
| 2023-08-16 | 106683P | ND |
| 2023-08-16 | 106688P | ND |
| 2023-08-16 | 106687P | ND |
| 2023-08-16 | 106686P | ND |
| 2023-08-16 | 106685P | ND |
| 2023-08-16 | 106684P | ND |
| 2023-08-16 | 106681P | ND |
| 2023-08-16 | 106680P | ND |
| 2023-08-16 | 106679P | ND |
| 2023-08-16 | 106678P | ND |
| 2023-08-16 | 106677P | ND |
| 2023-12-19 | 111489R | ND |