Perfluorononanoic acid (PFNA)
North Wales Water Authority
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 | 22 | 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 | ND | 1 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2014-03-10 | 35130253003AM | ND |
| 2014-03-10 | 35130253013AM | ND |
| 2014-03-10 | 35130253015AM | ND |
| 2014-03-10 | 35130253007AM | ND |
| 2014-03-10 | 35130253005AM | ND |
| 2014-03-10 | 35130253001AM | ND |
| 2014-03-10 | 35130253019AM | ND |
| 2014-03-10 | 35130253017AM | ND |
| 2014-03-10 | 35130253009AM | ND |
| 2014-03-10 | 35130253011AM | ND |
| 2014-05-06 | 35138004011AM | ND |
| 2014-08-11 | 35150785011AM | ND |
| 2014-08-11 | 35150785019AM | ND |
| 2014-08-11 | 35150785007AM | ND |
| 2014-08-11 | 35150785009AM | ND |
| 2014-08-11 | 35150785017AM | ND |
| 2014-08-11 | 35150785020AM | ND |
| 2014-08-11 | 35150785015AM | ND |
| 2014-08-11 | 35150785003AM | ND |
| 2014-08-11 | 35150785005AM | ND |
| 2014-08-11 | 35150785001AM | ND |
| 2014-11-10 | 35164087003AM | ND |
| 2020-02-05 | ND |