Pentachlorophenol
West Jefferson Waterworks District 2
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 | ND | 2 | 0 | ND |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 2 | 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 |
|---|---|---|
| 2018-01-30 | 35371297004 | ND |
| 2018-01-30 | 35371297004 | ND |
| 2018-10-02 | 35421760001 | ND |
| 2018-10-02 | 35421760001 | ND |
| 2019-02-05 | 35446731001 | ND |
| 2019-02-05 | 35446731001 | ND |
| 2019-08-14 | 35490415001 | ND |
| 2019-08-14 | 35490415001 | ND |
| 2020-03-18 | 35538508001 | ND |
| 2020-10-26 | 35587646001 | ND |
| 2021-01-28 | 35608074001 | ND |
| 2021-12-08 | 35683670001 | ND |
| 2021-12-09 | 35683306001 | ND |
| 2022-01-13 | 35690758001 | ND |
| 2022-08-04 | 35737248001 | ND |
| 2023-02-01 | 35777179001 | ND |
| 2023-10-31 | 35838752001 | ND |