Perfluorononanoic acid (PFNA)
The Preserve At Hopkinton Condo
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 | N/A | 0 | 0 | N/A |
| 2021 | ND | 1 | 0 | ND |
| 2022 | 0.407 ppt | 11 | 6 | ND - 0.814 ppt |
| 2023 | 0.408 ppt | 10 | 6 | ND - 0.739 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 | Result |
|---|---|
| 2021-12-10 | ND |
| 2022-01-17 | ND |
| 2022-02-09 | ND |
| 2022-03-08 | ND |
| 2022-04-19 | ND |
| 2022-06-21 | ND |
| 2022-07-18 | 0.749 ppt |
| 2022-08-16 | 0.792 ppt |
| 2022-09-28 | 0.726 ppt |
| 2022-10-06 | 0.694 ppt |
| 2022-11-28 | 0.700 ppt |
| 2022-12-05 | 0.814 ppt |
| 2023-01-24 | 0.670 ppt |
| 2023-02-15 | ND |
| 2023-03-01 | 0.617 ppt |
| 2023-04-12 | ND |
| 2023-05-09 | ND |
| 2023-06-12 | ND |
| 2023-09-15 | 0.652 ppt |
| 2023-10-04 | 0.734 ppt |
| 2023-11-08 | 0.739 ppt |
| 2023-12-26 | 0.665 ppt |