Pentachlorophenol
Medford Water 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 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | ND | 5 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 2 | 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 |
|---|---|---|
| 2020-01-08 | 2001031001-S | ND |
| 2020-01-08 | 2001031002-S | ND |
| 2020-06-25 | 2006116401A-S | ND |
| 2020-08-19 | 2008082301-S | ND |
| 2020-08-19 | 2008082301A-S | ND |
| 2021-01-28 | 2101107501-S | ND |
| 2021-01-28 | 2101107501B-S | ND |
| 2021-01-28 | 2101107502B-S | ND |
| 2021-01-28 | 2101107502-S | ND |
| 2022-01-31 | 2201113102A-S | ND |
| 2022-01-31 | 2201113101A-S | ND |
| 2023-01-27 | 23010989-01-S | ND |
| 2023-01-27 | 23010989-02-S | ND |
| 2023-06-15 | 23060760-01C-S | ND |
| 2023-09-12 | 23090413-01A-S | ND |