Pentachlorophenol
Rayburn Country Municipal Utility District
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 | 4 | 0 | ND |
| 2021 | ND | 2 | 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 |
|---|---|---|
| 2020-07-23 | AF20500 | ND |
| 2020-07-23 | AF20502 | ND |
| 2020-11-12 | AF34438 | ND |
| 2020-11-12 | AF34439 | ND |
| 2021-01-13 | AF39228 | ND |
| 2021-01-13 | AF39233 | ND |
| 2022-03-29 | AF91091 | ND |
| 2022-03-29 | AF91093 | ND |
| 2023-02-16 | AG29414 | ND |
| 2023-02-16 | AG29428 | ND |