Pentachlorophenol
Ephrata Area Joint Authority
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 | ND | 1 | 0 | ND |
| 2020 | ND | 8 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 9 | 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 |
|---|---|---|
| 2018-04-10 | 8008752-01 | ND |
| 2019-04-01 | 9002713-01 | ND |
| 2020-04-06 | 22168930.00 | ND |
| 2020-04-13 | 22169116.00 | ND |
| 2020-04-13 | 22169115.00 | ND |
| 2020-04-16 | 22365712.00 | ND |
| 2020-07-13 | 22754045.00 | ND |
| 2020-07-13 | 22754046.00 | ND |
| 2020-07-14 | 22754087.00 | ND |
| 2020-07-17 | 22952588.00 | ND |
| 2021-05-07 | 24590722.00 | ND |
| 2022-04-12 | 26604806.00 | ND |
| 2023-04-14 | 29057142.00 | ND |
| 2023-04-14 | 29056982.00 | ND |
| 2023-04-14 | 28855647.00 | ND |
| 2023-04-14 | 29056981.00 | ND |
| 2023-04-14 | 29056983.00 | ND |
| 2023-07-11 | 29654742.00 | ND |
| 2023-07-18 | 29654909.00 | ND |
| 2023-08-09 | 29844102.00 | ND |
| 2023-08-29 | 29844141.00 | ND |