1,2,4-Trichlorobenzene
Angelica Village Public Water
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 | 5 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | 0.500 ppb | 1 | 1 | 0.500 ppb |
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 |
|---|---|---|
| 2018-01-23 | EHS1800003815POC | ND |
| 2018-04-10 | 1805085-001 | ND |
| 2018-04-10 | 1805085-002 | ND |
| 2018-07-12 | 1811302-001 | ND |
| 2018-10-10 | 1817655-001 | ND |
| 2019-01-08 | 1900347-001 | ND |
| 2019-06-05 | EHS1900029887POC | ND |
| 2020-07-13 | 2010566-001 | ND |
| 2021-09-23 | 2116229-001 | ND |
| 2022-05-17 | 2207014-001 | ND |
| 2022-07-12 | EHS2200032672-01P | ND |
| 2023-05-16 | EHS2300027426-01 | 0.500 ppb |