Perfluorononanoic acid (PFNA)
Mount Kisco Water Department
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 | N/A | 0 | 0 | N/A |
| 2021 | ND | 13 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | 0.234 ppt | 9 | 1 | ND - 2.11 ppt |
| 2024 | 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 |
|---|---|---|
| 2021-05-12 | L212522-01-PFAS | ND |
| 2021-05-12 | L212522-05-PFAS | ND |
| 2021-05-12 | L212522-06-PFAS | ND |
| 2021-05-12 | L2125221-04-PFAS | ND |
| 2021-05-12 | L2125221-03-PFAS | ND |
| 2021-08-24 | L21445595-06-PFAS | ND |
| 2021-08-24 | L2145595-07-PFAS | ND |
| 2021-08-24 | L2145595-05-PFAS | ND |
| 2021-08-24 | L2145595-01-PFAS | ND |
| 2021-11-15 | L2163351-06-PFAS | ND |
| 2021-11-15 | L2163351-07-PFAS | ND |
| 2021-11-15 | L2163351-05-PFAS | ND |
| 2021-11-15 | L216335-01-PFAS | ND |
| 2022-08-15 | 420-232326-5-PFAS | ND |
| 2022-08-15 | 420-232326-1-PFAS | ND |
| 2022-08-15 | 420-232326-6-PFAS | ND |
| 2022-08-15 | 420-232326-7-PFAS | ND |
| 2023-01-05 | AZ00337-PFAS | ND |
| 2023-06-26 | 23F3504-01-PFAS | ND |
| 2023-09-25 | AZ17746-PFAS | ND |
| 2023-09-25 | AZ17750-PFAS | ND |
| 2023-09-25 | AZ17747-PFAS | ND |
| 2023-09-25 | AZ17749-PFAS | ND |
| 2023-09-25 | AZ17748-PFAS | 2.11 ppt |
| 2023-12-11 | AZ22401-PFAS | ND |
| 2023-12-12 | AZ22494-PFAS | ND |
| 2024-03-20 | 114674P | ND |
| 2024-03-20 | 114675P | ND |
| 2024-06-19 | 117926P | ND |