Perfluoroheptanoic acid (PFHPA)
Pepperell DPW Water Division
Perfluoroheptanoic acid is a member of a group of perfluorinated chemicals used in many consumer products. Perfluorinated chemicals can cause serious health effects, including cancer, endocrine disruption, accelerated puberty, liver and immune system damage, and thyroid changes. These chemicals are persistent in the environment and they accumulate in people. 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 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | 0.835 ppt | 48 | 35 | ND - 2.53 ppt |
| 2022 | 1.06 ppt | 50 | 40 | ND - 4.14 ppt |
| 2023 | 1.08 ppt | 49 | 42 | ND - 2.40 ppt |
ppt = parts per trillion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 1,000 ppt
The EWG Health Guideline of 1,000 ppt for perfluoroheptanoic acid was defined by EPA's recommended application of the toxicity value for PFHxA published in the Integrated Risk Information System’s toxicological review. This health guideline harm to fetal growth and child development.
ppt = parts per trillion
All test results
| Date | Result |
|---|---|
| 2021-03-08 | 1.72 ppt |
| 2021-03-08 | 0.600 ppt |
| 2021-03-08 | 1.55 ppt |
| 2021-03-08 | 1.36 ppt |
| 2021-03-08 | 1.32 ppt |
| 2021-04-06 | 1.26 ppt |
| 2021-04-06 | 1.31 ppt |
| 2021-04-06 | 0.656 ppt |
| 2021-04-06 | ND |
| 2021-04-06 | ND |
| 2021-04-06 | 0.741 ppt |
| 2021-04-06 | 0.756 ppt |
| 2021-05-12 | 0.715 ppt |
| 2021-05-12 | 1.19 ppt |
| 2021-05-12 | 0.786 ppt |
| 2021-05-12 | 0.900 ppt |
| 2021-05-12 | 1.12 ppt |
| 2021-06-23 | 0.929 ppt |
| 2021-06-23 | ND |
| 2021-06-23 | 0.849 ppt |
| 2021-06-23 | 0.833 ppt |
| 2021-06-23 | 0.933 ppt |
| 2021-07-22 | ND |
| 2021-07-22 | ND |
| 2021-07-22 | ND |
| 2021-08-18 | 2.28 ppt |
| 2021-08-18 | 2.53 ppt |
| 2021-08-18 | 1.04 ppt |
| 2021-08-18 | 1.20 ppt |
| 2021-08-18 | 0.678 ppt |
| 2021-09-22 | 1.42 ppt |
| 2021-09-22 | 0.592 ppt |
| 2021-09-22 | 1.28 ppt |
| 2021-10-15 | 0.878 ppt |
| 2021-10-15 | 1.41 ppt |
| 2021-10-15 | 0.603 ppt |
| 2021-10-15 | ND |
| 2021-10-15 | ND |
| 2021-10-15 | ND |
| 2021-10-15 | 1.46 ppt |
| 2021-11-17 | ND |
| 2021-11-17 | 1.74 ppt |
| 2021-11-17 | ND |
| 2021-11-17 | 1.14 ppt |
| 2021-12-20 | ND |
| 2021-12-20 | 1.17 ppt |
| 2021-12-20 | ND |
| 2021-12-20 | 1.15 ppt |
| 2022-01-13 | 1.06 ppt |
| 2022-01-13 | 0.635 ppt |
| 2022-01-13 | ND |
| 2022-01-13 | 0.864 ppt |
| 2022-01-13 | ND |
| 2022-02-15 | 1.25 ppt |
| 2022-02-15 | 1.07 ppt |
| 2022-02-15 | 0.908 ppt |
| 2022-02-22 | 1.29 ppt |
| 2022-03-17 | 0.770 ppt |
| 2022-03-17 | 0.852 ppt |
| 2022-03-17 | 1.19 ppt |
| 2022-03-17 | 1.06 ppt |
| 2022-04-19 | ND |
| 2022-04-19 | 0.997 ppt |
| 2022-04-28 | 1.04 ppt |
| 2022-04-28 | 1.06 ppt |
| 2022-05-09 | 1.19 ppt |
| 2022-05-12 | 1.44 ppt |
| 2022-05-12 | 1.12 ppt |
| 2022-05-12 | 1.50 ppt |
| 2022-06-13 | 1.10 ppt |
| 2022-06-13 | 2.36 ppt |
| 2022-06-13 | ND |
| 2022-06-13 | 1.52 ppt |
| 2022-07-26 | 4.14 ppt |
| 2022-07-26 | 1.81 ppt |
| 2022-07-26 | 0.723 ppt |
| 2022-07-26 | 0.650 ppt |
| 2022-07-26 | 1.30 ppt |
| 2022-09-13 | 1.81 ppt |
| 2022-09-13 | ND |
| 2022-09-13 | 1.48 ppt |
| 2022-09-13 | ND |
| 2022-09-13 | 1.53 ppt |
| 2022-09-13 | 1.30 ppt |
| 2022-09-13 | 1.26 ppt |
| 2022-10-04 | 1.23 ppt |
| 2022-10-04 | ND |
| 2022-10-04 | 2.44 ppt |
| 2022-10-04 | 1.14 ppt |
| 2022-10-05 | ND |
| 2022-11-01 | 1.11 ppt |
| 2022-11-01 | ND |
| 2022-11-01 | 0.983 ppt |
| 2022-11-01 | 2.53 ppt |
| 2022-12-06 | ND |
| 2022-12-06 | 0.796 ppt |
| 2022-12-06 | 1.82 ppt |
| 2022-12-06 | 0.848 ppt |
| 2023-01-03 | 1.18 ppt |
| 2023-01-03 | 1.05 ppt |
| 2023-01-03 | 1.16 ppt |
| 2023-01-03 | 1.12 ppt |
| 2023-01-25 | ND |
| 2023-01-25 | ND |
| 2023-02-07 | 1.33 ppt |
| 2023-02-07 | 0.984 ppt |
| 2023-02-07 | 1.06 ppt |
| 2023-02-07 | 0.876 ppt |
| 2023-02-09 | ND |
| 2023-03-06 | 1.21 ppt |
| 2023-03-06 | 0.914 ppt |
| 2023-03-06 | 0.869 ppt |
| 2023-03-06 | 1.19 ppt |
| 2023-04-04 | 1.11 ppt |
| 2023-04-04 | 0.909 ppt |
| 2023-04-04 | 0.836 ppt |
| 2023-04-04 | 0.986 ppt |
| 2023-05-02 | 1.02 ppt |
| 2023-05-02 | 1.04 ppt |
| 2023-05-02 | 0.813 ppt |
| 2023-05-03 | 1.01 ppt |
| 2023-06-06 | 1.19 ppt |
| 2023-06-06 | 0.949 ppt |
| 2023-06-06 | 2.40 ppt |
| 2023-07-24 | 1.55 ppt |
| 2023-07-24 | 1.35 ppt |
| 2023-07-24 | 2.30 ppt |
| 2023-07-24 | ND |
| 2023-07-24 | 1.62 ppt |
| 2023-08-08 | 1.70 ppt |
| 2023-08-08 | 1.30 ppt |
| 2023-08-08 | 1.53 ppt |
| 2023-08-16 | 1.37 ppt |
| 2023-09-12 | 1.28 ppt |
| 2023-09-12 | 0.981 ppt |
| 2023-09-12 | 1.49 ppt |
| 2023-09-19 | ND |
| 2023-09-19 | ND |
| 2023-10-03 | 0.934 ppt |
| 2023-10-03 | 1.49 ppt |
| 2023-10-03 | ND |
| 2023-11-07 | 1.46 ppt |
| 2023-11-07 | 0.803 ppt |
| 2023-11-07 | 1.48 ppt |
| 2023-12-07 | 1.24 ppt |
| 2023-12-07 | 1.97 ppt |
| 2023-12-07 | 1.97 ppt |