Pentachlorophenol
Mansfield Water System
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 | 0.0190 ppb | 2 | 1 | ND - 0.0380 ppb |
| 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 |
|---|---|---|
| 2018-04-19 | 35387645001 | ND |
| 2018-04-19 | 35387645001 | ND |
| 2018-08-06 | 35409597001 | ND |
| 2018-08-06 | 35409597001 | ND |
| 2019-03-13 | 35454725001 | ND |
| 2019-03-13 | 35454725001 | ND |
| 2019-08-01 | 35486698001 | ND |
| 2019-08-01 | 35486698001 | ND |
| 2020-02-03 | 35528231001 | ND |
| 2020-09-22 | 35579680001 | ND |
| 2021-03-03 | 35616824004 | 0.0380 ppb |
| 2021-08-17 | 35657244001 | ND |
| 2022-02-22 | 35699238003 | ND |
| 2022-08-22 | 35742155002 | ND |
| 2023-02-07 | 35778295005 | ND |
| 2023-08-21 | 35823285001 | ND |