Pentachlorophenol
Kent Water Department
NOTE: Kent Water Department purchases water from City of Tacoma which is required to test for pentachlorophenol. Sample information shown below was taken by City of Tacoma.
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 | 1 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 9 | 0 | ND |
| 2022 | ND | 3 | 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
NOTE: Kent Water Department purchases water from City of Tacoma which is required to test for pentachlorophenol. Sample information shown below was taken by City of Tacoma.
| Date | Lab ID | Result |
|---|---|---|
| 2021-06-21 | 4149607 | ND |
| 2021-06-21 | 4149606 | ND |
| 2021-06-21 | 4149605 | ND |
| 2021-06-30 | 4142829 | ND |
| 2021-06-30 | 4142830 | ND |
| 2021-07-21 | 4157684 | ND |
| 2021-07-21 | 4157695 | ND |
| 2021-07-22 | 4157703 | ND |
| 2022-02-01 | 4258884 | ND |
| 2022-09-15 | 4369966 | ND |
| 2022-11-15 | 4383023 | ND |
| 2023-09-05 | 4543470 | ND |
| 2023-09-06 | 4543472 | ND |