1,2,4-Trichlorobenzene
Bull Run Mountain/evergreen (brme)
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 | 6 | 0 | ND |
| 2021 | ND | 6 | 0 | ND |
| 2022 | ND | 6 | 0 | ND |
| 2023 | ND | 6 | 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 | Lab ID | Result |
|---|---|---|
| 2018-07-18 | WE-1-1807V | ND |
| 2018-07-18 | WB-7-1807V | ND |
| 2018-07-18 | WB-5-1807V | ND |
| 2018-07-18 | WB-13-1807V | ND |
| 2018-07-18 | WB-11-1807V | ND |
| 2018-07-18 | WB-12-1807V | ND |
| 2019-10-28 | WB-12-1910V | ND |
| 2019-10-28 | WB-11-1910V | ND |
| 2019-10-28 | WE-1-1910V | ND |
| 2019-10-28 | WB-7-1910V | ND |
| 2019-10-28 | WB-5-1910V | ND |
| 2019-10-28 | WB-13-1910V | ND |
| 2020-02-24 | WE-1-2002V | ND |
| 2020-02-24 | WB-7-2002V | ND |
| 2020-02-24 | WB-5-2002V | ND |
| 2020-02-24 | WB-13-2002V | ND |
| 2020-02-24 | WB-12-2002V | ND |
| 2020-02-24 | WB-11-2002V | ND |
| 2021-04-27 | 21042610-01V | ND |
| 2021-04-27 | 21042610-06V | ND |
| 2021-04-27 | 21042610-05V | ND |
| 2021-04-27 | 21042610-04V | ND |
| 2021-04-27 | 21042610-03V | ND |
| 2021-04-27 | 21042610-02V | ND |
| 2022-07-26 | 22-12670 VOC | ND |
| 2022-07-26 | 22-12669 VOC | ND |
| 2022-07-26 | 22-12668 VOC | ND |
| 2022-07-26 | 22-12667 VOC | ND |
| 2022-09-29 | 22092907-01-VOC | ND |
| 2022-12-13 | 22-21032 VOC | ND |
| 2023-10-24 | 23102311-01_VOC | ND |
| 2023-10-24 | 23102311-02_VOC | ND |
| 2023-10-24 | 23102311-03_VOC | ND |
| 2023-10-24 | 23102311-04_VOC | ND |
| 2023-10-24 | 23102311-05_VOC | ND |
| 2023-10-24 | 23102311-06_VOC | ND |