EPA Designation Regulated
EPA Classification Organic Chemicals
EPA Levels 1,2 0.007 MCLG (mg/L)
0.007 MCLG (mg/L)
Alternative Names none
Sources Runoff from herbicide used on soybeans and vegetables
Dinoseb is an herbicide historically used on soybeans and vegetables; it is associated with birth defects and reproductive difficulties and has been banned in the U.S. since 1986.


Dinoseb is an organic solid -- yellowish crystals with a pungent odor.


Its greatest use is as a contact herbicide for post-emergence weed control in cereals, undersown cereals, seedling lucerne and peas. Dinoseb is also used as a corn enhancer and an insecticide and miticide.

Health Effects

Some people who drink water containing dinoseb well in excess of the maximum contaminant level (MCL) for many years could experience reproductive difficulties.

EPA Data Source: Dinoseb

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.