1,2,4-Trichlorobenzene
Palmer Water District No.1
1,2,4-Trichlorobenzene is an industrial solvent that can harm the adrenal glands and may increase the risk of cancer.
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 | 6 | 0 | ND |
| 2019 | ND | 6 | 0 | ND |
| 2020 | ND | 8 | 0 | ND |
| 2021 | ND | 8 | 0 | ND |
| 2022 | ND | 7 | 0 | ND |
| 2023 | ND | 7 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 5 ppb
The EWG Health Guideline of 5 ppb for 1,2,4-trichlorobenzene 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 hormone disruption.
EPA Maximum Contaminant
Level (MCL): 70 ppb
The legal limit for 1,2,4-trichlorobenzene, established in 1992, was based on a toxicity study in laboratory animals conducted in 1981. This limit may not fully protect against hormone disruption.
ppb = parts per billion
All test results
| Date | Result |
|---|---|
| 2018-08-06 | ND |
| 2018-08-14 | ND |
| 2018-08-14 | ND |
| 2018-08-14 | ND |
| 2018-08-14 | ND |
| 2018-08-14 | ND |
| 2019-08-12 | ND |
| 2019-08-13 | ND |
| 2019-08-13 | ND |
| 2019-08-13 | ND |
| 2019-08-13 | ND |
| 2019-11-19 | ND |
| 2020-01-15 | ND |
| 2020-04-08 | ND |
| 2020-09-09 | ND |
| 2020-09-09 | ND |
| 2020-09-09 | ND |
| 2020-09-09 | ND |
| 2020-09-09 | ND |
| 2020-12-03 | ND |
| 2021-01-07 | ND |
| 2021-04-06 | ND |
| 2021-07-27 | ND |
| 2021-07-27 | ND |
| 2021-07-27 | ND |
| 2021-07-27 | ND |
| 2021-07-27 | ND |
| 2021-11-09 | ND |
| 2022-01-05 | ND |
| 2022-04-05 | ND |
| 2022-07-12 | ND |
| 2022-07-12 | ND |
| 2022-07-12 | ND |
| 2022-07-12 | ND |
| 2022-07-12 | ND |
| 2023-03-07 | ND |
| 2023-07-18 | ND |
| 2023-07-18 | ND |
| 2023-07-18 | ND |
| 2023-07-18 | ND |
| 2023-07-18 | ND |
| 2023-10-17 | ND |