Perfluorononanoic acid (PFNA)
Boothbay Region Water District
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 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | 1.79 ppt | 2 | 1 | ND - 3.57 ppt |
| 2023 | 0.459 ppt | 7 | 1 | ND - 3.21 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 |
|---|---|---|
| 2022-07-27 | 2207-05303-001 | ND |
| 2022-10-20 | 2210-04284-001 | 3.57 ppt |
| 2023-03-07 | 102156P | ND |
| 2023-06-07 | 105039P | ND |
| 2023-08-15 | 2308-03560-002 | ND |
| 2023-08-15 | 2308-03560-001 | 3.21 ppt |
| 2023-09-07 | 2309-01702-001 | ND |
| 2023-09-19 | 107804P | ND |
| 2023-12-13 | 110665P | ND |