Perfluorohexane sulfonate (PFHXS)
Hanson Water Department
Perfluorohexane sulfonate 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 |
|---|---|---|---|---|
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | 1.94 ppt | 9 | 9 | 0.622 ppt - 3.91 ppt |
| 2021 | 0.755 ppt | 6 | 6 | 0.570 ppt - 0.930 ppt |
| 2022 | 0.807 ppt | 3 | 3 | 0.750 ppt - 0.860 ppt |
| 2023 | 0.990 ppt | 1 | 1 | 0.990 ppt |
ppt = parts per trillion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 0.001 ppt
The EWG Health Guideline of 0.001 ppt for perfluorohexane sulfonate was defined by EPA's toxicity value published in the Integrated Risk Information System's toxicological review. This health guideline harm to the developing immune system.
EPA Maximum Contaminant
Level (MCL): 10 ppt
ppt = parts per trillion
All test results
| Date | Result |
|---|---|
| 2021-10-18 | 0.580 ppt |
| 2021-10-18 | 0.670 ppt |
| 2021-10-18 | 0.880 ppt |
| 2021-10-18 | 0.930 ppt |
| 2021-10-18 | 0.570 ppt |
| 2021-11-29 | 0.900 ppt |
| 2022-01-19 | 0.810 ppt |
| 2022-04-25 | 0.750 ppt |
| 2022-07-29 | 0.860 ppt |
| 2023-07-24 | 0.990 ppt |