Perfluorononanoic acid (PFNA)
Rowley 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 |
|---|---|---|---|---|
| 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 | ND | 4 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | 0.501 ppt | 9 | 5 | ND - 1.30 ppt |
| 2023 | 0.408 ppt | 22 | 10 | ND - 1.09 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 |
|---|---|
| 2020-03-10 | ND |
| 2020-03-10 | ND |
| 2020-03-10 | ND |
| 2020-03-10 | ND |
| 2022-01-26 | 0.730 ppt |
| 2022-01-26 | ND |
| 2022-04-13 | 0.580 ppt |
| 2022-04-13 | ND |
| 2022-07-12 | ND |
| 2022-07-12 | 0.730 ppt |
| 2022-10-11 | 1.30 ppt |
| 2022-10-11 | ND |
| 2022-12-21 | 1.17 ppt |
| 2023-01-09 | ND |
| 2023-01-09 | 1.09 ppt |
| 2023-01-10 | ND |
| 2023-01-10 | ND |
| 2023-02-06 | 0.726 ppt |
| 2023-03-06 | 0.843 ppt |
| 2023-04-05 | ND |
| 2023-04-05 | 0.685 ppt |
| 2023-05-11 | 0.890 ppt |
| 2023-06-01 | 0.920 ppt |
| 2023-07-06 | 0.939 ppt |
| 2023-07-06 | ND |
| 2023-07-10 | ND |
| 2023-07-10 | ND |
| 2023-08-15 | 0.946 ppt |
| 2023-09-06 | 1.000 ppt |
| 2023-10-02 | ND |
| 2023-10-02 | ND |
| 2023-10-11 | ND |
| 2023-11-02 | 0.930 ppt |
| 2023-11-29 | ND |
| 2023-12-04 | ND |