Perfluorononanoic acid (PFNA)
Essex Fells 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 |
|---|---|---|---|---|
| 2018 | ND | 16 | 0 | ND |
| 2019 | ND | 11 | 0 | ND |
| 2020 | ND | 12 | 0 | ND |
| 2021 | 0.287 ppt | 11 | 4 | ND - 0.930 ppt |
| 2022 | ND | 4 | 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 |
|---|---|---|
| 2019-05-31 | 4312837 | ND |
| 2019-05-31 | 4312835 | ND |
| 2019-05-31 | 4312839 | ND |
| 2019-08-20 | 10488508001 | ND |
| 2019-08-20 | 10488508003 | ND |
| 2019-08-20 | 10488508005 | ND |
| 2019-10-15 | 10496021001 | ND |
| 2019-10-15 | 10496021003 | ND |
| 2019-11-19 | 10500053001 | ND |
| 2019-11-19 | 10500053003 | ND |
| 2019-11-19 | 10500053005 | ND |
| 2020-02-18 | 10509257003 | ND |
| 2020-02-18 | 10509257005 | ND |
| 2020-02-18 | 10509257001 | ND |
| 2020-05-19 | 10519029001 | ND |
| 2020-05-19 | 10519029003 | ND |
| 2020-06-25 | 10523101001 | ND |
| 2020-08-18 | 10529223001 | ND |
| 2020-08-18 | 10529223003 | ND |
| 2020-08-18 | 10529223005 | ND |
| 2020-11-17 | 10539962005 | ND |
| 2020-11-17 | 10539962003 | ND |
| 2020-11-17 | 10539962001 | ND |
| 2021-02-16 | 10548177001 | ND |
| 2021-02-16 | 10548177005 | ND |
| 2021-02-16 | 10548177003 | ND |
| 2021-05-18 | 012105347-0001 | 0.760 ppt |
| 2021-05-18 | 012105347-0005 | ND |
| 2021-05-18 | 012105347-0003 | 0.850 ppt |
| 2021-07-21 | 012108141-0001 | 0.620 ppt |
| 2021-07-21 | 012108141-0003 | ND |
| 2021-07-21 | 012108141-0005 | 0.930 ppt |
| 2021-10-22 | 1101118-01 | ND |
| 2021-12-14 | 1120827-01 | ND |
| 2022-01-11 | 2010405-01 | ND |
| 2022-06-03 | 2060148-01 | ND |
| 2022-08-09 | 2080455-01 | ND |
| 2022-12-08 | 2120325-01 | ND |
| 2023-02-16 | 23B0696-01 | ND |
| 2023-05-17 | 23E0835-01 | ND |
| 2023-08-08 | 23H0518-01 | ND |
| 2023-09-25 | 23I1340-01 | ND |
| 2023-12-27 | 23L1175-01 | ND |