Pentachlorophenol
California Water Service - Livermore
NOTE: California Water Service - Livermore purchases water from Zone 7 Water Agency which is required to test for pentachlorophenol. Sample information shown below was taken by Zone 7 Water Agency.
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 | 15 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 1 | 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: California Water Service - Livermore purchases water from Zone 7 Water Agency which is required to test for pentachlorophenol. Sample information shown below was taken by Zone 7 Water Agency.
| Date | Lab ID | Result |
|---|---|---|
| 2020-05-11 | CA0110010_026_026-202005111155 | ND |
| 2020-07-06 | CA0110010_001_001-202007061140 | ND |
| 2020-07-06 | CA0110010_008_008-202007061035 | ND |
| 2020-07-06 | CA0110010_008_008-202007061035 | ND |
| 2020-07-06 | CA0110010_012_012-202007060725 | ND |
| 2020-07-06 | CA0110010_023_023-202007060920 | ND |
| 2020-07-06 | CA0110010_024_024-202007060820 | ND |
| 2020-07-06 | CA0110010_001_001-202007061140 | ND |
| 2020-07-07 | CA0110010_005_005-202007070940 | ND |
| 2020-07-07 | CA0110010_019_019-202007070800 | ND |
| 2020-07-07 | CA0110010_017_017-202007070925 | ND |
| 2020-07-07 | CA0110010_011_011-202007070850 | ND |
| 2020-07-07 | CA0110010_006_006-202007071115 | ND |
| 2020-07-08 | CA0110010_007_007-202007080830 | ND |
| 2020-07-08 | CA0110010_013_013-202007080925 | ND |
| 2021-11-08 | CA0110010_026_026-202111081055 | ND |
| 2023-10-02 | CA0110010_001_001-202310020740 | ND |
| 2023-10-02 | CA0110010_008_008-202310020945 | ND |
| 2023-10-02 | CA0110010_010_010-202310021200 | ND |
| 2023-10-03 | CA0110010_013_013-202310031220 | ND |
| 2023-10-03 | CA0110010_011_011-202310030940 | ND |
| 2023-10-03 | CA0110010_020_020-202310031150 | ND |
| 2023-10-03 | CA0110010_005_005-202310031040 | ND |
| 2023-11-15 | CA0110010_007_007-202311150945 | ND |
| 2023-11-15 | CA0110010_019_019-202311151040 | ND |