Perfluorohexanoic Acid (PFHxA)
Carmel Water District 3
Perfluorohexanoic 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 |
|---|---|---|---|---|
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | 4.02 ppt | 13 | 9 | ND - 10.3 ppt |
| 2023 | 5.61 ppt | 11 | 8 | ND - 12.3 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 perfluorohexanoic acid was defined by EPA's toxicity value published in the Integrated Risk Information System's toxicological review. This health guideline protects against harm to fetal growth and child development.
ppt = parts per trillion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2022-04-27 | CL17972 | 10.3 ppt |
| 2022-07-06 | CL71012 | 6.48 ppt |
| 2022-07-06 | CL71014 | ND |
| 2022-07-27 | CL90397 | 5.53 ppt |
| 2022-10-05 | CM50196 | ND |
| 2022-10-05 | CM50203 | ND |
| 2022-10-05 | CM50201 | 5.66 ppt |
| 2022-10-05 | CM50197 | 5.52 ppt |
| 2022-10-05 | CM50198 | 2.99 ppt |
| 2022-10-19 | CM66325 | 5.42 ppt |
| 2022-10-19 | CM66326 | 5.51 ppt |
| 2022-10-19 | CM66324 | ND |
| 2022-11-01 | CM74682 | 4.79 ppt |
| 2023-01-11 | CN21618 | ND |
| 2023-01-11 | CN21616 | 8.75 ppt |
| 2023-01-25 | CN30096 | 12.3 ppt |
| 2023-05-10 | CO02886PFAS | ND |
| 2023-05-10 | CO02888PFAS | 7.10 ppt |
| 2023-05-24 | CO13339PFAS | ND |
| 2023-05-24 | CO13337PFAS | 9.74 ppt |
| 2023-08-09 | CO70650PFAS | 2.47 ppt |
| 2023-08-09 | CO70648PFAS | 11.0 ppt |
| 2023-09-06 | CO91840PFAS | 7.76 ppt |
| 2023-09-06 | CO91842PFAS | 2.58 ppt |