1,2,4-Trichlorobenzene
City of Hearne
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 |
|---|---|---|
| 2018-06-21 | AE31001 | ND |
| 2018-06-21 | AE31005 | ND |
| 2018-06-21 | AE31007 | ND |
| 2018-06-21 | AE30999 | ND |
| 2019-05-16 | AE66869 | ND |
| 2019-05-16 | AE66871 | ND |
| 2019-05-16 | AE66873 | ND |
| 2019-05-16 | AE66875 | ND |
| 2020-04-23 | AF07870 | ND |
| 2020-06-30 | AF17373 | ND |
| 2020-06-30 | AF17375 | ND |
| 2020-06-30 | AF17377 | ND |
| 2021-06-08 | AF56947 | ND |
| 2021-06-08 | AF56967 | ND |
| 2021-06-08 | AF56965 | ND |
| 2021-06-08 | AF56957 | ND |
| 2022-06-22 | AG01932 | ND |
| 2022-06-22 | AG01934 | ND |
| 2022-06-22 | AG01936 | ND |
| 2022-06-22 | AG01938 | ND |
| 2023-06-13 | AG44230 | ND |
| 2023-06-13 | AG44232 | ND |
| 2023-06-13 | AG44234 | ND |
| 2023-07-27 | AG50404 | ND |