Perfluorononanoic acid (PFNA)
Hemlock Mutual Water Company
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 |
|---|---|---|---|---|
| 2015 | ND | 1 | 0 | ND |
| 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 | 2 | 0 | ND |
| 2021 | ND | 7 | 0 | ND |
| 2022 | ND | 6 | 0 | ND |
| 2023 | ND | 8 | 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 |
|---|---|---|
| 2015-06-02 | 113626P | ND |
| 2020-11-16 | CA1910053_001_001-202011161015 | ND |
| 2020-11-16 | CA1910053_002_002-202011161000 | ND |
| 2021-02-08 | CA1910053_001_001-202102080825 | ND |
| 2021-04-14 | CA1910053_002_002-202104140850 | ND |
| 2021-04-14 | CA1910053_001_001-202104140900 | ND |
| 2021-07-07 | CA1910053_002_002-202107071045 | ND |
| 2021-07-07 | CA1910053_001_001-202107071050 | ND |
| 2021-10-15 | CA1910053_001_001-202110150945 | ND |
| 2021-10-15 | CA1910053_002_002-202110150930 | ND |
| 2022-01-07 | CA1910053_001_001-202201070930 | ND |
| 2022-01-07 | CA1910053_002_002-202201070915 | ND |
| 2022-04-07 | CA1910053_002_002-202204070945 | ND |
| 2022-04-07 | CA1910053_001_001-202204071000 | ND |
| 2022-10-05 | CA1910053_001_001-202210051055 | ND |
| 2022-10-05 | CA1910053_002_002-202210051035 | ND |
| 2023-03-30 | CA1910053_002_002-202303300925 | ND |
| 2023-04-17 | CA1910053_001_001-202304170855 | ND |
| 2023-04-17 | CA1910053_002_002-202304170830 | ND |
| 2023-09-06 | CA1910053_001_001-202309060955 | ND |
| 2023-09-06 | CA1910053_002_002-202309060945 | ND |
| 2023-10-05 | CA1910053_002_002-202310050920 | ND |
| 2023-12-06 | CA1910053_001_001-202312060910 | ND |
| 2023-12-06 | CA1910053_001_001-20231206NUL | ND |