Perfluorononanoic acid (PFNA)
Whispering Pines
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 | ND | 1 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 5 | 0 | ND |
| 2021 | ND | 10 | 0 | ND |
| 2022 | ND | 8 | 0 | ND |
| 2023 | 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 |
|---|---|---|
| 2018-05-30 | GW1805301435EDK | ND |
| 2019-03-28 | GWNT1903281200KER | ND |
| 2019-06-21 | GWNT1906211400MK | ND |
| 2019-09-18 | GWNT1909180900GGA | ND |
| 2019-12-19 | GWNT1912190910KME | ND |
| 2020-03-25 | GWNT2003251210SK | ND |
| 2020-06-29 | GWNT2006291600MK | ND |
| 2020-10-05 | LJ27660 | ND |
| 2020-10-05 | GWNT2010051130MK | ND |
| 2020-10-05 | ND | |
| 2021-01-27 | 2101B51-01 | ND |
| 2021-01-27 | ND | |
| 2021-03-16 | 2103738-01 | ND |
| 2021-03-16 | ND | |
| 2021-06-29 | ND | |
| 2021-06-29 | 2106F84 | ND |
| 2021-09-21 | ND | |
| 2021-09-21 | 2109A98-01 | ND |
| 2021-12-20 | ND | |
| 2021-12-20 | 2112934-01 | ND |
| 2022-03-21 | 2203C07-01 | ND |
| 2022-03-21 | ND | |
| 2022-06-28 | ND | |
| 2022-06-28 | 2206K09-01 | ND |
| 2022-09-21 | ND | |
| 2022-09-21 | 2209F43-01 | ND |
| 2022-11-29 | ND | |
| 2022-11-29 | 2211F58-01 | ND |
| 2023-02-28 | 2302C71-01 | ND |
| 2023-02-28 | ND | |
| 2023-06-27 | ND | |
| 2023-09-18 | ND | |
| 2023-10-31 | ND |