Pentachlorophenol
Paw Penn District
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 | ND | 2 | 0 | ND |
| 2020 | ND | 15 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 14 | 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 |
|---|---|---|
| 2019-07-15 | 45716201 | ND |
| 2019-10-31 | 43999701 | ND |
| 2020-04-06 | 22069250.00 | ND |
| 2020-04-06 | 22069221.00 | ND |
| 2020-04-08 | 22069381.00 | ND |
| 2020-04-08 | 22069439.00 | ND |
| 2020-04-14 | 22069352.00 | ND |
| 2020-04-16 | 22069468.00 | ND |
| 2020-04-16 | 22069410.00 | ND |
| 2020-05-06 | 22261478.00 | ND |
| 2020-07-01 | 22652302.00 | ND |
| 2020-07-01 | 22652273.00 | ND |
| 2020-07-01 | 22652389.00 | ND |
| 2020-07-09 | 22652215.00 | ND |
| 2020-07-09 | 22652244.00 | ND |
| 2020-07-09 | 22652331.00 | ND |
| 2020-07-13 | 22652360.00 | ND |
| 2023-04-06 | 28749337.00 | ND |
| 2023-04-06 | 28749476.00 | ND |
| 2023-04-06 | 28749441.00 | ND |
| 2023-04-13 | 28749397.00 | ND |
| 2023-04-13 | 28749395.00 | ND |
| 2023-04-13 | 28749366.00 | ND |
| 2023-06-07 | 29155718.00 | ND |
| 2023-07-13 | 29346844.00 | ND |
| 2023-07-13 | 29346869.00 | ND |
| 2023-07-13 | 29346815.00 | ND |
| 2023-07-13 | 29346883.00 | ND |
| 2023-07-20 | 29346786.00 | ND |
| 2023-07-20 | 29346730.00 | ND |
| 2023-07-20 | 29346728.00 | ND |