1,2,4-Trichlorobenzene
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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 | 4 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 4 | 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 |
|---|---|---|
| 2018-01-10 | 38158601 | ND |
| 2018-04-04 | 39069901 | ND |
| 2018-07-03 | 40201501 | ND |
| 2018-10-04 | 41308901 | ND |
| 2019-01-09 | 42495701 | ND |
| 2019-04-10 | 43656201 | ND |
| 2019-07-16 | 45013801 | ND |
| 2019-10-10 | 46829601 | ND |
| 2020-02-12 | 21682283.00 | ND |
| 2020-04-09 | 22039224.00 | ND |
| 2020-07-09 | 22623450.00 | ND |
| 2020-10-06 | 23198004.00 | ND |
| 2021-01-08 | 23727847.00 | ND |
| 2021-04-06 | 24263157.00 | ND |
| 2021-08-12 | 25038894.00 | ND |
| 2021-10-13 | 25420760.00 | ND |
| 2022-01-06 | 25957941.00 | ND |
| 2022-04-06 | 26479743.00 | ND |
| 2022-07-13 | 27053541.00 | ND |
| 2022-10-05 | 27656703.00 | ND |
| 2023-01-05 | 28187434.00 | ND |
| 2023-04-05 | 28718738.00 | ND |
| 2023-07-06 | 29317602.00 | ND |
| 2023-10-05 | 29901719.00 | ND |