Pentachlorophenol
Berwick Bayou Vista Water Works Commission
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 | 6 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 2 | 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 |
|---|---|---|
| 2018-01-25 | 35370415001 | ND |
| 2018-01-25 | 35370415001 | ND |
| 2018-05-03 | 35390206001 | ND |
| 2018-05-03 | 35390206001 | ND |
| 2018-07-09 | 35403038001 | ND |
| 2018-07-09 | 35403038001 | ND |
| 2019-01-15 | 35442693001 | ND |
| 2019-01-15 | 35442693001 | ND |
| 2019-07-09 | 35480722001 | ND |
| 2019-07-09 | 35480722001 | ND |
| 2020-02-04 | 35528640001 | ND |
| 2020-10-15 | 35585522001 | ND |
| 2021-03-25 | 35621779001 | ND |
| 2021-11-30 | 35680897001 | ND |
| 2022-03-24 | 35706097001 | ND |
| 2022-07-28 | 35735505001 | ND |
| 2023-01-30 | 35776510001 | ND |
| 2023-10-09 | 35833393001 | ND |