Perfluorononanoic acid (PFNA)
Clare, City of
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 | ND | 1 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 8 | 0 | ND |
| 2022 | ND | 8 | 0 | ND |
| 2023 | ND | 5 | 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 |
|---|---|---|
| 2018-11-12 | GWEF1811120900GGA | ND |
| 2019-04-05 | GWEF1904051100GGA | ND |
| 2019-06-28 | GWEF1906281405ST | ND |
| 2019-09-26 | GWEF1909261425MK | ND |
| 2019-12-18 | GWEF1912181230KME | ND |
| 2020-03-30 | GWEF2003301055SK | ND |
| 2020-07-06 | GWEF2007061105MK | ND |
| 2020-10-08 | LJ28033 PFAS | ND |
| 2020-10-08 | GWEF2010081330GGA | ND |
| 2021-03-03 | 21C0145-01 PFAS | ND |
| 2021-03-03 | ND | |
| 2021-04-07 | 2104443-01 PFAS | ND |
| 2021-04-07 | ND | |
| 2021-07-07 | ND | |
| 2021-07-07 | 21G0309-01 PFAS | ND |
| 2021-10-06 | ND | |
| 2021-10-06 | 2110507-01 PFAS | ND |
| 2022-01-12 | 22A0380-305 PFAS | ND |
| 2022-01-12 | ND | |
| 2022-04-13 | ND | |
| 2022-04-13 | 2204A21-01 PFAS | ND |
| 2022-07-13 | ND | |
| 2022-07-13 | 22G0784 PFAS | ND |
| 2022-10-05 | ND | |
| 2022-10-05 | 22J0245 PFAS | ND |
| 2023-01-04 | 23A0211-01 PFAS | ND |
| 2023-01-04 | ND | |
| 2023-04-05 | ND | |
| 2023-07-05 | ND | |
| 2023-10-04 | ND |