Perfluorononanoic acid (PFNA)
Kennebunk, Kennebunkport & Wells WD
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 | ND | 4 | 0 | ND |
| 2014 | ND | 4 | 0 | ND |
| 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 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 4 | 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 |
|---|---|---|
| 2013-09-24 | 2902857 | ND |
| 2013-09-24 | 2902806 | ND |
| 2013-09-24 | 2902793 | ND |
| 2013-12-17 | 2947348 | ND |
| 2014-03-25 | 2997683 | ND |
| 2014-03-25 | 2997692 | ND |
| 2014-06-12 | 3044513 | ND |
| 2014-11-25 | 3145678 | ND |
| 2022-05-25 | L2227830-04 | ND |
| 2022-07-20 | L2238878-03 | ND |
| 2022-09-20 | L2251778-06 | ND |
| 2022-11-08 | L2262805-06 | ND |
| 2023-02-08 | L2307004-06 | ND |
| 2023-06-21 | L2335805-06 | ND |
| 2023-08-22 | L2348891-08 | ND |
| 2023-10-05 | L2359132-05 | ND |