Pentachlorophenol
Valencia Water Company Town Division
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 | 5 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 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 |
|---|---|---|
| 2018-02-28 | 577634-001 | ND |
| 2018-02-28 | 577635-001 | ND |
| 2018-03-01 | 577893-001 | ND |
| 2018-03-14 | 579056-001 | ND |
| 2018-04-05 | 581510-001 | ND |
| 2019-03-14 | 19C1489-01 | ND |
| 2019-06-05 | 19F0451-01 | ND |
| 2019-06-06 | 19F0664-01 | ND |
| 2020-04-14 | 20D1547-01 | ND |
| 2020-05-13 | 20E1444-01 | ND |
| 2020-06-24 | 20F2631-01 | ND |
| 2020-08-18 | 20H2009-01 | ND |
| 2023-02-01 | 23B0022-01 | ND |
| 2023-10-24 | 23J3046-01 | ND |