1,2,4-Trichlorobenzene
Sharyland Water Supply Corporation
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 2 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 6 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 3 | 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 |
|---|---|---|
| 2014-08-19 | AC64300 | ND |
| 2014-08-19 | AC64326 | ND |
| 2015-08-03 | AD02131 | ND |
| 2015-08-03 | AD02129 | ND |
| 2016-03-23 | AD30149 | ND |
| 2016-05-11 | AD36396 | ND |
| 2016-09-14 | AD49450 | ND |
| 2016-09-14 | AD49488 | ND |
| 2016-09-14 | AD49452 | ND |
| 2016-10-26 | AD55147 | ND |
| 2017-08-02 | AD92158 | ND |
| 2017-08-02 | AD92156 | ND |
| 2017-08-02 | AD92160 | ND |
| 2018-08-31 | AE39147 | ND |
| 2018-08-31 | AE39145 | ND |
| 2018-08-31 | AE39155 | ND |
| 2019-06-24 | AE71765 | ND |
| 2019-09-18 | AE83972 | ND |
| 2019-09-18 | AE83974 | ND |