Perfluorononanoic acid (PFNA)
Lakewood 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 | ND | 3 | 0 | ND |
| 2023 | ND | 17 | 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 |
|---|---|---|
| 2022-05-04 | 4314994 | ND |
| 2022-09-29 | 4370029 | ND |
| 2022-09-29 | 4370030 | ND |
| 2023-02-28 | 4444785 | ND |
| 2023-11-07 | 4543357 | ND |
| 2023-11-07 | 4543359 | ND |
| 2023-11-07 | 4543361 | ND |
| 2023-11-07 | 4543354 | ND |
| 2023-11-07 | 4543358 | ND |
| 2023-11-07 | 4543360 | ND |
| 2023-11-07 | 4543356 | ND |
| 2023-11-07 | 4543355 | ND |
| 2023-11-08 | 4543364 | ND |
| 2023-11-08 | 4543365 | ND |
| 2023-11-08 | 4543366 | ND |
| 2023-11-08 | 4543367 | ND |
| 2023-11-08 | 4543363 | ND |
| 2023-11-08 | 4543368 | ND |
| 2023-11-08 | 4543362 | ND |
| 2023-12-13 | 4552320 | ND |
| 2024-04-17 | 380-92166-1 | ND |
| 2024-04-17 | 380-92166-2 | ND |
| 2024-04-17 | 380-92166-3 | ND |
| 2024-04-17 | 380-92166-5 | ND |
| 2024-05-09 | 380-95307-1 | ND |