Perfluorononanoic acid (PFNA)
North Castle Water District #2
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 |
|---|---|---|---|---|
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | 0.217 ppt | 13 | 4 | ND - 0.772 ppt |
| 2022 | 0.553 ppt | 29 | 19 | ND - 1.15 ppt |
| 2023 | 0.234 ppt | 27 | 8 | ND - 1.21 ppt |
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 |
|---|---|---|
| 2021-08-11 | L214313801-PFAS | ND |
| 2021-08-23 | L214531203-PFAS | ND |
| 2021-08-23 | L214531201-PFAS | ND |
| 2021-08-23 | L214531202-PFAS | 0.678 ppt |
| 2021-08-24 | L214531205-PFAS | ND |
| 2021-10-01 | L215350301-PFAS | ND |
| 2021-10-01 | L215350302-PFAS | 0.630 ppt |
| 2021-11-05 | L216117901-PFAS | ND |
| 2021-12-28 | L217128704-PFAS | ND |
| 2021-12-28 | L217128702-PFAS | ND |
| 2021-12-28 | L217128703-PFAS | 0.772 ppt |
| 2021-12-28 | L217128701-PFAS | 0.735 ppt |
| 2021-12-28 | L217128705-PFAS | ND |
| 2022-02-10 | L220739903-PFAS | ND |
| 2022-02-10 | L220739901-PFAS | 1.01 ppt |
| 2022-02-10 | L220739902-PFAS | 0.690 ppt |
| 2022-03-27 | L2315936-02-PFAS | ND |
| 2022-03-29 | L221626003-PFAS | 0.791 ppt |
| 2022-03-29 | L221626005-PFAS | ND |
| 2022-03-29 | L221626001-PFAS | ND |
| 2022-03-29 | L221626004-PFAS | 0.906 ppt |
| 2022-05-05 | L222365702-PFAS | 0.853 ppt |
| 2022-05-05 | L222365701-PFAS | 1.15 ppt |
| 2022-05-05 | L222365703-PFAS | ND |
| 2022-06-28 | L2234455-01-PFAS | 1.04 ppt |
| 2022-06-28 | L2234455-02-PFAS | 1.07 ppt |
| 2022-06-28 | L2234455-03-PFAS | ND |
| 2022-06-28 | L2234455-04-PFAS | ND |
| 2022-08-01 | L2241135-01-PFAS | 0.640 ppt |
| 2022-08-01 | L2241135-03-PFAS | 0.701 ppt |
| 2022-08-01 | L2241135-02-PFAS | 0.676 ppt |
| 2022-09-28 | L2253716-04-PFAS | 0.718 ppt |
| 2022-09-28 | L2253716-03-PFAS | ND |
| 2022-09-28 | L2253716-01-PFAS | 0.708 ppt |
| 2022-09-28 | L2253716-02-PFAS | 0.740 ppt |
| 2022-10-26 | L2259860-01-PFAS | 0.696 ppt |
| 2022-10-26 | L2259860-02-PFAS | 1.15 ppt |
| 2022-10-26 | L2259860-03-PFAS | 0.934 ppt |
| 2022-12-01 | L2267398-04-PFAS | 0.745 ppt |
| 2022-12-01 | L2267398-03-PFAS | ND |
| 2022-12-01 | L2267398-02-PFAS | 0.826 ppt |
| 2022-12-01 | L2267398-01-PFAS | ND |
| 2023-01-05 | L2300642-04-PFAS | 0.861 ppt |
| 2023-01-05 | L2300642-03-PFAS | ND |
| 2023-02-16 | L2308675-01-PFAS | ND |
| 2023-02-16 | L2308675-04-PFAS | 0.633 ppt |
| 2023-02-16 | L2308675-02-PFAS | 0.665 ppt |
| 2023-02-16 | L2308675-03-PFAS | ND |
| 2023-02-16 | L2308675-05-PFAS | ND |
| 2023-03-27 | L2315936-01-PFAS | ND |
| 2023-05-04 | L2324681-04-PFAS | ND |
| 2023-05-04 | L2324681-05-PFAS | ND |
| 2023-05-17 | L2324681-01-PFAS | ND |
| 2023-05-17 | L2324681-03-PFAS | ND |
| 2023-05-17 | L2324681-02-PFAS | 0.816 ppt |
| 2023-06-06 | L2331620-02-PFAS | 0.680 ppt |
| 2023-06-06 | L2331620-01-PFAS | ND |
| 2023-08-15 | L2347438-03-PFAS | ND |
| 2023-08-15 | L2347438-04-PFAS | 0.727 ppt |
| 2023-08-15 | L2347438-01-PFAS | ND |
| 2023-08-15 | L2347438-02-PFAS | 0.727 ppt |
| 2023-09-27 | L2357063-03-PFAS | ND |
| 2023-09-27 | L2357063-01-PFAS | ND |
| 2023-09-27 | L2357063-02-PFAS | ND |
| 2023-10-31 | L2364496-06-PFAS | ND |
| 2023-10-31 | L2364496-01-PFAS | ND |
| 2023-10-31 | L2364496-03-PFAS | ND |
| 2023-10-31 | L2364496-02-PFAS | 1.21 ppt |
| 2023-10-31 | L2364496-04-PFAS | ND |