Perfluorononanoic acid (PFNA)
Hoosick Falls
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 | 0.381 ppt | 32 | 7 | ND - 1.80 ppt |
| 2022 | 0.0240 ppt | 26 | 1 | ND - 0.630 ppt |
| 2023 | 0.547 ppt | 19 | 6 | ND - 1.80 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 |
|---|---|---|
| 2021-02-04 | 410-28622-1 | 1.80 ppt |
| 2021-02-04 | 410-28622-4 | 1.80 ppt |
| 2021-02-04 | 410-28622-7-P25 | ND |
| 2021-02-04 | 410-28622-3 | 1.70 ppt |
| 2021-02-04 | 410-28622-8-FTB | ND |
| 2021-02-04 | 410-28622-9-LTB | ND |
| 2021-02-04 | 410-28622-2 | 1.70 ppt |
| 2021-02-04 | 410-28622-5-50 | ND |
| 2021-02-04 | 410-28622-6-75 | ND |
| 2021-03-04 | 410-31382-1 | ND |
| 2021-03-04 | 410-31382-3 | ND |
| 2021-03-04 | 410-31382-2 | ND |
| 2021-05-18 | 410-40418-3 | ND |
| 2021-05-18 | 410-40418-2 | ND |
| 2021-05-18 | 410-40418-1 | 1.70 ppt |
| 2021-06-03 | 410-42452-2 | ND |
| 2021-06-03 | 410-42452-3 | ND |
| 2021-06-03 | 410-42452-1 | ND |
| 2021-07-01 | 410-45809-2 | ND |
| 2021-07-01 | 410-45809-3 | ND |
| 2021-07-01 | 410-45809-1 | ND |
| 2021-08-05 | 410-50447-1 | ND |
| 2021-08-05 | 410-50447-3 | ND |
| 2021-09-02 | 410-53847-1 | ND |
| 2021-09-02 | 410-53847-2 | ND |
| 2021-09-02 | 410-53847-3 | ND |
| 2021-09-24 | 410-56678-1 | ND |
| 2021-10-07 | 410-58350-3 | ND |
| 2021-11-18 | 410-64207-1 | 1.80 ppt |
| 2021-12-02 | 410-65486-1 | 1.70 ppt |
| 2021-12-16 | 410-67377-3 | ND |
| 2021-12-29 | GAC INFLUENT | ND |
| 2022-01-13 | GAC INFLUENT | ND |
| 2022-02-03 | 410-71774-1 | ND |
| 2022-03-03 | GAC INFLUENT030322 | ND |
| 2022-03-07 | JH2201746 | 0.630 ppt |
| 2022-03-07 | JH2201745 | ND |
| 2022-03-07 | JH2201744 | ND |
| 2022-04-07 | 410-79423-3 | ND |
| 2022-04-07 | 410-79423-1 | ND |
| 2022-05-05 | 410-83056-1 | ND |
| 2022-05-05 | 410-83056-2 | ND |
| 2022-05-05 | 410-83056-3 | ND |
| 2022-07-07 | 410-90405-2 | ND |
| 2022-07-07 | 410-90405-1 | ND |
| 2022-07-07 | 410-90405-3 | ND |
| 2022-07-07 | 410-090405-1 | ND |
| 2022-07-21 | 410-92065-1 | ND |
| 2022-08-18 | 410-95085-2 | ND |
| 2022-08-18 | 410-95085-1 | ND |
| 2022-08-18 | 410-95085-3 | ND |
| 2022-09-01 | 410-96682-3 | ND |
| 2022-09-01 | 410-96682-5 | ND |
| 2022-09-01 | 410-96682-4 | ND |
| 2022-09-26 | 410-99464-1 | ND |
| 2022-10-06 | 410-101220-1 | ND |
| 2022-12-01 | 410-107636-1 | ND |
| 2022-12-01 | 410-107636-3 | ND |
| 2023-01-05 | 410-111429-1A | ND |
| 2023-02-02 | 410-114241-1 | ND |
| 2023-03-02 | 410-117488-1 | ND |
| 2023-03-16 | 410-119243-2 | ND |
| 2023-03-16 | 410-119243-1 | ND |
| 2023-03-30 | 410-120972-1 | ND |
| 2023-03-30 | 410-120972-2 | ND |
| 2023-04-27 | 410-124754-2 | ND |
| 2023-06-01 | 410-129018-2 | ND |
| 2023-06-01 | 410-129018-1 | ND |
| 2023-07-06 | 410-133677-1 | ND |
| 2023-08-03 | 410137604-3 | 1.70 ppt |
| 2023-08-03 | 410137604-2 | 1.70 ppt |
| 2023-08-03 | 410137604-1 | 1.80 ppt |
| 2023-10-17 | 410-147466-1-MID | 1.70 ppt |
| 2023-11-28 | 112823-PRE | 1.80 ppt |
| 2023-11-28 | 410-152696-3-POST | 1.70 ppt |
| 2023-12-14 | 410-154873-1-PRE | ND |
| 2023-12-14 | 410-154873-3-POST | ND |