Pentachlorophenol
Gurdon Waterworks
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 | ND | 4 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2018-01-22 | 18025000702 | ND |
| 2018-01-22 | 18025000802 | ND |
| 2018-04-24 | 18115005402 | ND |
| 2018-04-24 | 18115005502 | ND |
| 2019-01-23 | 19024002002 | ND |
| 2019-04-30 | 19122001702 | ND |
| 2019-08-06 | 19220001802 | ND |
| 2019-11-18 | 19324000202 | ND |
| 2021-02-09 | 21041002102 | ND |
| 2021-02-09 | 21041002202 | ND |
| 2021-04-05 | 21098004002 | ND |
| 2021-04-05 | 21098004102 | ND |
| 2022-01-11 | 22013002602 | ND |
| 2022-05-04 | O197615-MCP-1 | ND |