1,2,4-Trichlorobenzene
Old Marbach School Water Supply Corporation
1,2,4-Trichlorobenzene is an industrial solvent that can harm the adrenal glands and may increase the risk of cancer.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | ND | 1 | 0 | ND |
2015 | ND | 2 | 0 | ND |
2016 | ND | 3 | 0 | ND |
2017 | ND | 2 | 0 | ND |
2018 | ND | 2 | 0 | ND |
2019 | ND | 2 | 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 |
---|---|---|
2014-01-28 | AC40440 | ND |
2015-08-06 | AD03002 | ND |
2015-08-06 | AD02954 | ND |
2016-02-09 | AD22766 | ND |
2016-02-09 | AD22774 | ND |
2016-06-08 | AD39820 | ND |
2017-11-06 | AE03663 | ND |
2017-12-12 | AE07541 | ND |
2018-02-14 | AE13778 | ND |
2018-02-14 | AE13790 | ND |
2019-12-09 | AE91909 | ND |
2019-12-09 | AE91911 | ND |