Perfluorononanoic acid (PFNA)
Hillview Water Company-oakhurst/sierra Lakes
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 | 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 | ND | 21 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | N/A | 0 | 0 | N/A |
| 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 |
|---|---|---|
| 2020-10-20 | CA2010007_032_032-202010201657 | ND |
| 2020-10-20 | CA2010007_010_010-202010201602 | ND |
| 2020-10-20 | CA2010007_007_007-202010201551 | ND |
| 2020-10-20 | CA2010007_039_039-202010201823 | ND |
| 2020-10-20 | CA2010007_034_034-202010201725 | ND |
| 2020-10-20 | CA2010007_030_030-202010201633 | ND |
| 2020-10-20 | CA2010007_031_031-202010201648 | ND |
| 2020-10-20 | CA2010007_041_041-202010201830 | ND |
| 2020-10-20 | CA2010007_009_009-202010201617 | ND |
| 2020-10-20 | CA2010007_033_033-202010201705 | ND |
| 2020-10-21 | CA2010007_017_017-202010211242 | ND |
| 2020-10-21 | CA2010007_048_048-202010211416 | ND |
| 2020-10-21 | CA2010007_047_047-202010211408 | ND |
| 2020-10-21 | CA2010007_024_024-202010211719 | ND |
| 2020-10-21 | CA2010007_003_003-202010211737 | ND |
| 2020-10-21 | CA2010007_001_001-202010211747 | ND |
| 2020-10-21 | CA2010007_002_002-202010211803 | ND |
| 2020-10-21 | CA2010007_028_028-202010211549 | ND |
| 2020-10-21 | CA2010007_046_046-202010211400 | ND |
| 2020-11-04 | CA2010007_039_039-202011041540 | ND |
| 2020-11-23 | CA2010007_039_039-202011231525 | ND |
| 2021-02-17 | CA2010007_040_040-202102171121 | ND |
| 2023-04-19 | 102837P | ND |
| 2023-04-19 | 102839P | ND |
| 2023-09-13 | 108496R | ND |
| 2023-09-13 | 108506R | ND |
| 2023-10-02 | 108579P | ND |
| 2023-10-02 | 108580P | ND |
| 2023-10-03 | 108577P | ND |
| 2023-10-03 | 108578P | ND |