1,2,4-Trichlorobenzene
Hawthorne Water Department
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 |
|---|---|---|---|---|
| 2014 | ND | 2 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
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 |
|---|---|---|
| 2014-02-19 | 5701-004-0910 | ND |
| 2014-05-21 | 5701-004-1110 | ND |
| 2015-05-27 | 5701-004-1106 | ND |
| 2016-05-18 | 5701-004-0945 | ND |
| 2016-07-13 | 9590-008-0915 | ND |
| 2017-01-18 | 5701-004-1030 | ND |
| 2017-07-31 | 5701-004-1140 | ND |
| 2017-10-18 | 5701-004-1030 | ND |
| 2018-01-24 | 5701-004-0840 | ND |
| 2018-04-18 | 5810-004-0930 | ND |
| 2018-07-26 | 5701-004-0900 | ND |
| 2018-10-17 | 9590-004-1055 | ND |
| 2019-01-23 | 9590-004-1055 | ND |
| 2019-04-17 | 5701-004-1120 | ND |
| 2019-07-17 | 5701-004-1315 | ND |
| 2019-10-16 | 5701-004-1110 | ND |