EPA Designation Regulated
EPA Classification Organic Chemicals
EPA Levels 1,2 0.07 MCLG (mg/L)
0.07 MCLG (mg/L)
Alternative Names none
Sources Discharge from textile finishing factories
1,2,4-Trichlorobenzene is a pollutant from textile finishing factories and industrial chemical manufacturing.


1,2,4-Trichlorobenzene is an aromatic, colorless organic liquid.


The greatest use of 1,2,4-trichlorobenzene is primarily as a dye carriet. It is also used to make herbicides and other organic chemicals; as a solvent; in wood preservatives; in abrasives. It was once used as a soil treatment for termite control.

Health Effects

Some people who drink water containing 1,2,4-trichlorobenzene well in excess of the maximum contaminant level (MCL) for many years could experience changes in their adrenal glands.

EPA Data Source: 1,2,4-Trichlorobenzene

EPA Definitions:

1Maximum Contaminant Level Goal (MCLG) - The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety and are non-enforceable public health goals.

Maximum Contaminant Level (MCL) - The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to MCLGs as feasible using the best available treatment technology and taking cost into consideration. MCLs are enforceable standards.

Maximum Residual Disinfectant Level Goal (MRDLG) - The level of a drinking water disinfectant below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants.

(TT) Treatment Technique - A required process intended to reduce the level of a contaminant in drinking water.

Maximum Residual Disinfectant Level (MRDL) - The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.

2 Units are in milligrams per liter (mg/L) unless otherwise noted. Milligrams per liter are equivalent to parts per million.