Total PFOS and PFOA
Kopachuck Ridge Water District
Perfluorooctane sulfonate (PFOS) and Perfluorooctanoic acid (PFOA) are a member of a group of perfluorinated chemicals used in many consumer products. PFOS, PFOA and other 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 | N/A | 0 | 0 | N/A |
| 2023 | 17.2 ppt | 1 | 1 | 17.2 ppt |
ppt = parts per trillion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 0.007 ppt
EWG applied the health guideline of 0.09 ppt, defined by the California Office of Environmental Health Hazard Assessment as a public health goal for PFOA, to PFOS and PFOA combined. This health guideline protects against cancer.
ppt = parts per trillion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2023-10-31 | 4550196 | 17.2 ppt |