Perfluorononanoic acid (PFNA)
Hopedale Water Department
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 | 0.542 ppt | 20 | 14 | ND - 1.05 ppt |
| 2021 | 0.259 ppt | 2 | 1 | ND - 0.518 ppt |
| 2022 | ND | 3 | 0 | ND |
| 2023 | 0.324 ppt | 3 | 1 | ND - 0.973 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 |
|---|---|
| 2020-10-28 | 0.782 ppt |
| 2020-10-28 | ND |
| 2020-10-28 | ND |
| 2020-10-28 | ND |
| 2020-10-28 | 0.837 ppt |
| 2020-10-28 | 1.05 ppt |
| 2020-10-28 | ND |
| 2020-11-09 | 0.642 ppt |
| 2020-11-09 | 0.902 ppt |
| 2020-11-09 | 0.642 ppt |
| 2020-11-09 | 1.05 ppt |
| 2020-11-09 | 0.456 ppt |
| 2020-11-09 | 0.748 ppt |
| 2020-11-09 | ND |
| 2020-11-09 | 0.575 ppt |
| 2020-11-09 | 1.05 ppt |
| 2020-11-09 | 0.748 ppt |
| 2020-11-09 | 0.452 ppt |
| 2020-11-09 | 0.912 ppt |
| 2020-11-09 | ND |
| 2021-10-07 | 0.518 ppt |
| 2021-11-16 | ND |
| 2022-01-12 | ND |
| 2022-04-05 | ND |
| 2022-07-19 | ND |
| 2023-11-16 | ND |
| 2023-11-16 | 0.973 ppt |
| 2023-11-16 | ND |