Pentachlorophenol
Western Cass Water Supply Corporation
Pentachlorophenol is a carcinogenic chemical used as a wood preservative. It harms developing fetuses, and causes immune suppression and hormone disruption.
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 | ND | 9 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 6 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 0.3 ppb
The EWG Health Guideline of 0.3 ppb for pentachlorophenol was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.
EPA Maximum Contaminant
Level (MCL): 1 ppb
The legal limit for pentachlorophenol, established in 1991, was based on analytical detection limits at the time that the standard was set.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2020-03-19 | Q2011997008 | ND |
| 2020-03-19 | Q2011997019 | ND |
| 2020-04-21 | Q2015767024 | ND |
| 2020-04-21 | Q2015767025 | ND |
| 2020-04-21 | Q2015767026 | ND |
| 2020-04-21 | Q2015767027 | ND |
| 2020-04-21 | Q2015767040 | ND |
| 2020-07-28 | Q2029440009 | ND |
| 2020-10-22 | Q2041222009 | ND |
| 2023-08-01 | Q2331111003 | ND |
| 2023-08-01 | Q2331111014 | ND |
| 2023-10-02 | Q2342120002 | ND |
| 2023-10-02 | Q2342120018 | ND |
| 2023-10-02 | Q2342120019 | ND |
| 2023-10-02 | Q2342120020 | ND |