Perfluorononanoic acid (PFNA)
PUD #1 of Asotin County
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 |
|---|---|---|---|---|
| 2014 | ND | 6 | 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 | 6 | 0 | ND |
| 2023 | ND | 3 | 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 |
|---|---|---|
| 2014-01-14 | 140115033-003 | ND |
| 2014-01-14 | 140115033-001 | ND |
| 2014-01-14 | 140115033-002 | ND |
| 2014-07-24 | 140725002-003 | ND |
| 2014-07-24 | 140725002-001 | ND |
| 2014-07-24 | 140725002-002 | ND |
| 2022-06-14 | 4304661 | ND |
| 2022-06-14 | 4304662 | ND |
| 2022-06-14 | 4304659 | ND |
| 2022-06-14 | 4304663 | ND |
| 2022-06-14 | 4304658 | ND |
| 2022-06-14 | 4304660 | ND |
| 2023-06-14 | 4472218 | ND |
| 2023-09-18 | 4517320 | ND |
| 2023-12-07 | 4554250 | ND |