1,2,4-Trichlorobenzene
Havasu Heights Domestic Water Improvement District
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 | 3 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 1 | 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 |
|---|---|---|
| 2018-02-21 | 201802220159V | ND |
| 2018-02-21 | 201802220160V | ND |
| 2018-02-21 | 201802220161V | ND |
| 2019-11-25 | 201911260012V | ND |
| 2020-06-10 | 202006110024V | ND |
| 2021-04-28 | 202104290062V | ND |
| 2021-04-28 | 202104290063V | ND |
| 2021-04-28 | 202104290064V | ND |
| 2022-02-03 | 202202040123V | ND |
| 2023-05-09 | 380-46635-3 | ND |