1,2,4-Trichlorobenzene
Dtma Main System
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 | 12 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 11 | 0 | ND |
| 2018 | ND | 7 | 0 | ND |
| 2019 | ND | 5 | 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 |
|---|---|---|
| 2014-08-12 | 2023366010 | ND |
| 2014-08-12 | 2023366001 | ND |
| 2014-08-12 | 2023366012 | ND |
| 2014-08-12 | 2023366011 | ND |
| 2014-08-12 | 2023366009 | ND |
| 2014-08-12 | 2023366008 | ND |
| 2014-08-12 | 2023366007 | ND |
| 2014-08-12 | 2023366006 | ND |
| 2014-08-12 | 2023366005 | ND |
| 2014-08-12 | 2023366004 | ND |
| 2014-08-12 | 2023366003 | ND |
| 2014-08-12 | 2023366002 | ND |
| 2015-08-18 | 13125622 | ND |
| 2015-08-18 | 13125679 | ND |
| 2015-08-18 | 13125748 | ND |
| 2015-08-18 | 13125805 | ND |
| 2016-07-12 | 14556871 | ND |
| 2016-07-12 | 14556829 | ND |
| 2016-07-12 | 14556850 | ND |
| 2016-07-12 | 14556892 | ND |
| 2017-09-27 | 16715930 | ND |
| 2017-09-27 | 16715972 | ND |
| 2017-09-27 | 16715909 | ND |
| 2017-09-27 | 16715888 | ND |
| 2017-09-27 | 16715867 | ND |
| 2017-09-27 | 16715846 | ND |
| 2017-09-27 | 16715825 | ND |
| 2017-09-27 | 16715804 | ND |
| 2017-09-27 | 16715993 | ND |
| 2017-09-27 | 16715951 | ND |
| 2017-10-24 | 16869398 | ND |
| 2018-02-16 | 2296852001 | ND |
| 2018-04-30 | 8012267-01 | ND |
| 2018-09-21 | 8094450-01 | ND |
| 2018-09-21 | 8094450-02 | ND |
| 2018-09-21 | 8094450-03 | ND |
| 2018-09-25 | 8029075-01 | ND |
| 2018-11-20 | 3002172001 | ND |
| 2019-03-18 | 3023286001 | ND |
| 2019-08-27 | 3054542001 | ND |
| 2019-08-27 | 3054542003 | ND |
| 2019-08-27 | 3054542005 | ND |
| 2019-08-27 | 3054542007 | ND |