Perfluorononanoic acid (PFNA)
Ardmore 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 |
|---|---|---|---|---|
| 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 | 6 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | 0.780 ppt | 5 | 1 | ND - 3.90 ppt |
| 2023 | ND | 12 | 0 | ND |
| 2024 | ND | 5 | 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 |
|---|---|---|
| 2020-02-28 | 20144380002_PFAS | ND |
| 2020-02-28 | 20144380003_PFAS | ND |
| 2020-02-28 | 20144380001_PFAS | ND |
| 2020-08-13 | 20167216001_PFAS | ND |
| 2020-08-13 | 20167216002_PFAS | ND |
| 2020-08-13 | 20167216003_PFAS | ND |
| 2022-09-02 | 35744081001_PFAS | ND |
| 2022-09-02 | 35744081002_PFAS | ND |
| 2022-11-28 | 35762245001_PFAS | ND |
| 2022-11-28 | 35762245003_PFAS | ND |
| 2022-12-13 | 35766151001_PFAS | 3.90 ppt |
| 2023-02-27 | 35782139001_PFAS | ND |
| 2023-02-27 | 35782139003_PFAS | ND |
| 2023-02-27 | 35782139005_PFAS | ND |
| 2023-05-04 | 35797065001_PFAS | ND |
| 2023-05-04 | 35797071001_PFAS | ND |
| 2023-05-04 | 35797065003_PFAS | ND |
| 2023-08-18 | 35821817001_PFAS | ND |
| 2023-08-18 | 35821817003_PFAS | ND |
| 2023-08-18 | 35821819001_PFAS | ND |
| 2023-10-20 | 35836012004_PFAS | ND |
| 2023-10-20 | 35836012005_PFAS | ND |
| 2023-11-07 | 35839705001_PFAS | ND |
| 2024-03-05 | 114098P | ND |
| 2024-03-05 | 114099P | ND |
| 2024-03-05 | 114100P | ND |
| 2024-09-10 | 120544P | ND |
| 2024-09-10 | 120546P | ND |