Mobility in the soil is related to organic matter and to the type of the residue. The metabolites are less mobile than the parent. Diuron levels in irrigation water were highest after the initial flush but declined rapidly as a result of dilution. It is relatively stable in neutral water. In California, diuron has been found in groundwater in the 2 to 3 ppb range.
Microbes are the primary factor in the degradation of diuron in aquatic environments.
Diuron is not expected to concentrate in aquatic organisms. Diuron is readily absorbed through the root system of plants and less readily through the leaves and stems. Chemical Information Fact Sheet. Hazardous Substances Databank. Health Advisory, Office of Drinking Water.