Perfluorononanoic acid (PFNA)
Collegeville Trappe Joint Public Works 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 | 1 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | 0.655 ppt | 24 | 6 | ND - 4.09 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 | Lab ID | Result |
|---|---|---|
| 2020-02-11 | ND | |
| 2021-01-12 | ND | |
| 2023-03-20 | 102424P | ND |
| 2023-03-20 | 102420P | ND |
| 2023-03-21 | 102418P | ND |
| 2023-03-21 | 102421P | ND |
| 2023-03-21 | 102419P | ND |
| 2023-03-22 | 102423P | ND |
| 2023-03-22 | 102422P | ND |
| 2023-08-21 | 29496145.00 | 1.91 ppt |
| 2023-08-21 | 29496144.00 | ND |
| 2023-09-18 | 108066P | ND |
| 2023-09-18 | 108065P | ND |
| 2023-09-18 | 108060P | ND |
| 2023-09-18 | 108062P | ND |
| 2023-09-20 | 108061P | ND |
| 2023-09-20 | 108063P | ND |
| 2023-12-04 | 30244438.00 | ND |
| 2023-12-04 | 30244442.00 | 3.12 ppt |
| 2023-12-04 | 30244443.00 | 4.09 ppt |
| 2023-12-04 | 30244441.00 | 2.73 ppt |
| 2023-12-04 | 30244439.00 | 1.83 ppt |
| 2023-12-04 | 30244440.00 | 2.04 ppt |
| 2023-12-18 | 30244758.00 | ND |
| 2023-12-18 | 30244757.00 | ND |
| 2023-12-18 | 30244756.00 | ND |