Pentachlorophenol
Quincy Water Department City Of
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 | 5 | 0 | ND |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 4 | 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 |
|---|---|---|
| 2018-05-09 | ND | |
| 2018-05-09 | ND | |
| 2018-05-21 | ND | |
| 2018-05-21 | ND | |
| 2019-05-21 | ND | |
| 2019-05-21 | ND | |
| 2019-05-21 | ND | |
| 2019-05-21 | ND | |
| 2019-06-17 | ND | |
| 2021-03-04 | 4089331 | ND |
| 2021-07-09 | 4144644 | ND |
| 2021-07-09 | 4144641 | ND |
| 2021-07-09 | 4144645 | ND |
| 2022-08-16 | 4338184 | ND |
| 2022-08-16 | 4338186 | ND |
| 2022-08-24 | 4344917 | ND |
| 2022-08-24 | 4344920 | ND |
| 2023-03-09 | 4424687 | ND |
| 2023-03-09 | 4424686 | ND |
| 2023-03-09 | 4424685 | ND |
| 2023-03-09 | 4509785 | ND |