1,2,4-Trichlorobenzene
Chisholm Hills Estates
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 | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 2 | 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 |
|---|---|---|
| 2018-09-18 | Q1837077001 | ND |
| 2018-09-18 | Q1837077003 | ND |
| 2019-05-21 | Q1927166003 | ND |
| 2019-05-21 | Q1927166005 | ND |
| 2020-11-18 | Q2045746001 | ND |
| 2020-11-18 | Q2045746003 | ND |
| 2021-06-29 | Q2116975009 | ND |
| 2021-06-29 | Q2116975011 | ND |
| 2022-11-15 | Q2234333005 | ND |
| 2022-11-15 | Q2234333007 | ND |
| 2023-07-20 | Q2328725003 | ND |
| 2023-09-06 | Q2338462001 | ND |