Pentachlorophenol
City of Post Falls
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 | 7 | 0 | ND |
| 2020 | ND | 8 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 10 | 0 | ND |
| 2023 | ND | 3 | 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 |
|---|---|---|
| 2019-11-13 | S210893 | ND |
| 2019-11-13 | S210943 | ND |
| 2019-11-18 | S211061 | ND |
| 2019-12-09 | S211718 | ND |
| 2019-12-16 | S211919 | ND |
| 2019-12-18 | S211064 | ND |
| 2019-12-19 | S211105 | ND |
| 2020-01-08 | S202001013101 | ND |
| 2020-01-08 | S212482 | ND |
| 2020-01-08 | S212481 | ND |
| 2020-01-08 | S212480 | ND |
| 2020-01-08 | S212478 | ND |
| 2020-01-08 | S212477 | ND |
| 2020-01-08 | S212476 | ND |
| 2020-01-08 | S212479 | ND |
| 2021-11-30 | S202111052501 | ND |
| 2022-02-09 | S202202020201 | ND |
| 2022-03-09 | S202203020202 | ND |
| 2022-03-09 | S202203020102 | ND |
| 2022-03-14 | S202203025401 | ND |
| 2022-03-14 | S202203025301 | ND |
| 2022-04-27 | S202204053601 | ND |
| 2022-06-06 | S202206008601 | ND |
| 2022-06-07 | S202206010001 | ND |
| 2022-07-13 | S202207033801 | ND |
| 2022-11-01 | S2022110039 | ND |
| 2023-01-25 | S202301040801 | ND |
| 2023-05-15 | S202305028801 | ND |
| 2023-12-13 | S202312023501 | ND |