Perfluorononanoic acid (PFNA)
Ayer DPW Water Division
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 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 | ND | 43 | 0 | ND |
| 2019 | 0.248 ppt | 52 | 10 | ND - 1.92 ppt |
| 2020 | 0.959 ppt | 30 | 22 | ND - 3.97 ppt |
| 2021 | 0.496 ppt | 64 | 30 | ND - 2.05 ppt |
| 2022 | 0.166 ppt | 49 | 8 | ND - 2.08 ppt |
| 2023 | 0.148 ppt | 74 | 9 | ND - 2.91 ppt |
| 2024 | N/A | 0 | 0 | N/A |
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 | Result |
|---|---|
| 2018-01-09 | ND |
| 2018-01-09 | ND |
| 2018-01-09 | ND |
| 2018-01-09 | ND |
| 2018-01-09 | ND |
| 2018-01-09 | ND |
| 2018-01-09 | ND |
| 2018-01-09 | ND |
| 2018-01-09 | ND |
| 2018-01-09 | ND |
| 2018-02-08 | ND |
| 2018-02-12 | ND |
| 2018-03-01 | ND |
| 2018-03-01 | ND |
| 2018-03-01 | ND |
| 2018-03-07 | ND |
| 2018-03-07 | ND |
| 2018-04-23 | ND |
| 2018-04-23 | ND |
| 2018-04-23 | ND |
| 2018-04-23 | ND |
| 2018-04-23 | ND |
| 2018-04-23 | ND |
| 2018-04-23 | ND |
| 2018-04-23 | ND |
| 2018-04-23 | ND |
| 2018-08-24 | ND |
| 2018-08-24 | ND |
| 2018-08-24 | ND |
| 2018-08-24 | ND |
| 2018-08-24 | ND |
| 2018-08-24 | ND |
| 2018-08-24 | ND |
| 2018-08-24 | ND |
| 2018-08-24 | ND |
| 2018-10-25 | ND |
| 2018-10-25 | ND |
| 2018-10-25 | ND |
| 2018-10-25 | ND |
| 2018-10-25 | ND |
| 2018-10-25 | ND |
| 2018-10-25 | ND |
| 2018-10-25 | ND |
| 2019-02-20 | ND |
| 2019-02-20 | ND |
| 2019-02-20 | ND |
| 2019-02-20 | ND |
| 2019-02-20 | ND |
| 2019-02-20 | ND |
| 2019-02-20 | ND |
| 2019-02-20 | ND |
| 2019-02-20 | ND |
| 2019-02-20 | ND |
| 2019-02-20 | ND |
| 2019-02-20 | ND |
| 2019-05-21 | ND |
| 2019-05-21 | ND |
| 2019-05-21 | ND |
| 2019-06-27 | ND |
| 2019-06-27 | ND |
| 2019-07-03 | ND |
| 2019-07-03 | ND |
| 2019-07-03 | 1.87 ppt |
| 2019-08-02 | 1.52 ppt |
| 2019-08-02 | ND |
| 2019-08-02 | ND |
| 2019-08-20 | ND |
| 2019-08-20 | ND |
| 2019-08-20 | ND |
| 2019-08-20 | ND |
| 2019-08-20 | ND |
| 2019-08-20 | ND |
| 2019-08-20 | ND |
| 2019-08-20 | ND |
| 2019-08-20 | ND |
| 2019-09-03 | 1.64 ppt |
| 2019-09-03 | ND |
| 2019-09-03 | ND |
| 2019-09-03 | ND |
| 2019-10-03 | 1.92 ppt |
| 2019-10-03 | ND |
| 2019-10-03 | ND |
| 2019-10-03 | ND |
| 2019-11-11 | ND |
| 2019-11-11 | ND |
| 2019-11-18 | 0.816 ppt |
| 2019-11-18 | 0.509 ppt |
| 2019-11-18 | 0.816 ppt |
| 2019-11-22 | 0.632 ppt |
| 2019-11-22 | 1.42 ppt |
| 2019-11-22 | 1.75 ppt |
| 2019-12-10 | ND |
| 2019-12-10 | ND |
| 2019-12-10 | ND |
| 2019-12-10 | ND |
| 2020-02-13 | 0.510 ppt |
| 2020-02-13 | 0.874 ppt |
| 2020-02-13 | 0.575 ppt |
| 2020-02-13 | 1.32 ppt |
| 2020-02-13 | ND |
| 2020-02-13 | 1.80 ppt |
| 2020-02-13 | 0.857 ppt |
| 2020-02-13 | 3.97 ppt |
| 2020-02-13 | 0.966 ppt |
| 2020-06-09 | 1.94 ppt |
| 2020-06-09 | 0.654 ppt |
| 2020-06-09 | 0.983 ppt |
| 2020-06-09 | 0.469 ppt |
| 2020-06-09 | 0.618 ppt |
| 2020-06-09 | 0.775 ppt |
| 2020-06-09 | 0.576 ppt |
| 2020-06-09 | 3.01 ppt |
| 2020-06-09 | 1.40 ppt |
| 2020-09-02 | 0.459 ppt |
| 2020-09-02 | 0.637 ppt |
| 2020-09-02 | 0.972 ppt |
| 2020-12-03 | ND |
| 2020-12-03 | ND |
| 2020-12-03 | ND |
| 2020-12-03 | 2.14 ppt |
| 2020-12-03 | 3.26 ppt |
| 2020-12-03 | ND |
| 2020-12-03 | ND |
| 2020-12-03 | ND |
| 2020-12-03 | ND |
| 2021-01-08 | 0.581 ppt |
| 2021-01-08 | 0.881 ppt |
| 2021-01-08 | ND |
| 2021-01-08 | ND |
| 2021-01-08 | 1.20 ppt |
| 2021-01-08 | 1.82 ppt |
| 2021-01-08 | 0.964 ppt |
| 2021-01-08 | ND |
| 2021-01-08 | 1.000 ppt |
| 2021-01-08 | 0.690 ppt |
| 2021-01-08 | 1.33 ppt |
| 2021-02-22 | ND |
| 2021-02-22 | 0.696 ppt |
| 2021-02-22 | ND |
| 2021-02-22 | ND |
| 2021-02-22 | ND |
| 2021-03-24 | ND |
| 2021-03-24 | 1.47 ppt |
| 2021-03-24 | 0.815 ppt |
| 2021-04-28 | ND |
| 2021-04-28 | 0.749 ppt |
| 2021-04-28 | ND |
| 2021-05-18 | ND |
| 2021-05-18 | ND |
| 2021-05-18 | 0.728 ppt |
| 2021-05-18 | 1.38 ppt |
| 2021-06-09 | 2.05 ppt |
| 2021-06-09 | 2.05 ppt |
| 2021-06-09 | 0.960 ppt |
| 2021-06-09 | 0.953 ppt |
| 2021-06-09 | 0.950 ppt |
| 2021-06-09 | ND |
| 2021-06-09 | ND |
| 2021-06-09 | 0.957 ppt |
| 2021-06-10 | ND |
| 2021-06-10 | ND |
| 2021-06-10 | 1.33 ppt |
| 2021-06-10 | ND |
| 2021-06-10 | ND |
| 2021-07-21 | ND |
| 2021-07-21 | ND |
| 2021-07-21 | 0.898 ppt |
| 2021-07-21 | 0.898 ppt |
| 2021-07-21 | 1.29 ppt |
| 2021-08-19 | 1.27 ppt |
| 2021-08-19 | ND |
| 2021-08-19 | 0.849 ppt |
| 2021-08-19 | ND |
| 2021-08-19 | ND |
| 2021-09-24 | 0.766 ppt |
| 2021-09-24 | ND |
| 2021-09-24 | ND |
| 2021-10-14 | 0.786 ppt |
| 2021-10-14 | ND |
| 2021-10-14 | ND |
| 2021-11-12 | 0.798 ppt |
| 2021-11-12 | ND |
| 2021-11-12 | ND |
| 2021-12-02 | ND |
| 2021-12-02 | 0.642 ppt |
| 2021-12-02 | ND |
| 2021-12-10 | ND |
| 2021-12-10 | ND |
| 2021-12-10 | ND |
| 2022-01-04 | ND |
| 2022-01-04 | ND |
| 2022-01-04 | ND |
| 2022-02-03 | ND |
| 2022-02-03 | ND |
| 2022-02-03 | ND |
| 2022-02-24 | 0.741 ppt |
| 2022-02-24 | ND |
| 2022-02-24 | ND |
| 2022-02-24 | 1.29 ppt |
| 2022-03-07 | ND |
| 2022-03-07 | 0.781 ppt |
| 2022-03-07 | ND |
| 2022-04-21 | ND |
| 2022-04-21 | ND |
| 2022-04-21 | 0.764 ppt |
| 2022-04-25 | ND |
| 2022-04-25 | 0.870 ppt |
| 2022-04-25 | 2.08 ppt |
| 2022-05-13 | ND |
| 2022-05-13 | ND |
| 2022-05-13 | 0.883 ppt |
| 2022-06-09 | 0.708 ppt |
| 2022-06-09 | ND |
| 2022-06-09 | ND |
| 2022-07-20 | ND |
| 2022-07-20 | ND |
| 2022-07-20 | ND |
| 2022-07-20 | ND |
| 2022-08-11 | ND |
| 2022-08-11 | ND |
| 2022-08-11 | ND |
| 2022-08-11 | ND |
| 2022-09-08 | ND |
| 2022-09-08 | ND |
| 2022-09-08 | ND |
| 2022-09-08 | ND |
| 2022-10-12 | ND |
| 2022-10-12 | ND |
| 2022-10-12 | ND |
| 2022-10-12 | ND |
| 2022-11-07 | ND |
| 2022-11-07 | ND |
| 2022-11-07 | ND |
| 2022-11-07 | ND |
| 2022-12-01 | ND |
| 2022-12-01 | ND |
| 2022-12-01 | ND |
| 2022-12-01 | ND |
| 2023-01-05 | ND |
| 2023-01-05 | ND |
| 2023-01-05 | ND |
| 2023-01-05 | ND |
| 2023-02-01 | ND |
| 2023-02-01 | ND |
| 2023-02-01 | ND |
| 2023-02-01 | ND |
| 2023-03-03 | ND |
| 2023-03-03 | ND |
| 2023-03-20 | ND |
| 2023-03-20 | ND |
| 2023-03-20 | ND |
| 2023-03-20 | ND |
| 2023-03-20 | ND |
| 2023-04-10 | ND |
| 2023-04-10 | ND |
| 2023-04-10 | ND |
| 2023-04-10 | ND |
| 2023-04-10 | ND |
| 2023-04-10 | ND |
| 2023-04-10 | ND |
| 2023-04-10 | ND |
| 2023-04-10 | ND |
| 2023-04-10 | ND |
| 2023-05-02 | ND |
| 2023-05-02 | ND |
| 2023-05-04 | ND |
| 2023-05-04 | ND |
| 2023-05-04 | ND |
| 2023-05-04 | ND |
| 2023-05-08 | 1.000 ppt |
| 2023-05-08 | 0.645 ppt |
| 2023-05-08 | 2.91 ppt |
| 2023-06-06 | ND |
| 2023-06-06 | ND |
| 2023-06-06 | ND |
| 2023-06-06 | ND |
| 2023-07-14 | ND |
| 2023-07-14 | ND |
| 2023-07-14 | ND |
| 2023-07-14 | ND |
| 2023-08-07 | 1.62 ppt |
| 2023-08-07 | 0.716 ppt |
| 2023-08-08 | ND |
| 2023-08-08 | ND |
| 2023-08-08 | ND |
| 2023-08-08 | ND |
| 2023-09-13 | ND |
| 2023-09-13 | ND |
| 2023-09-13 | ND |
| 2023-09-13 | 1.90 ppt |
| 2023-09-13 | ND |
| 2023-09-13 | ND |
| 2023-09-13 | ND |
| 2023-09-13 | 0.693 ppt |
| 2023-09-13 | 0.690 ppt |
| 2023-09-13 | 0.811 ppt |
| 2023-09-13 | ND |
| 2023-09-13 | ND |
| 2023-10-04 | ND |
| 2023-10-04 | ND |
| 2023-10-04 | ND |
| 2023-10-04 | ND |
| 2023-11-07 | ND |
| 2023-11-07 | ND |
| 2023-11-20 | ND |
| 2023-11-20 | ND |
| 2023-11-20 | ND |
| 2023-11-20 | ND |
| 2023-12-08 | ND |
| 2023-12-08 | ND |
| 2023-12-08 | ND |
| 2023-12-08 | ND |