Tebuthiuron has an average half-life of 12 to 15 months in the soil. In areas with low rainfall, the half-life can be much longer. In muck soils and soils with high organic matter, tebuthiuron also has a much longer half-life. Microorganisms metabolize or break down tebuthiuron in the soil. Plants absorb tebuthiuron from the soil and metabolize it.
Products formed by the break-down of tebuthiuron by soil microorganisms are low in toxicity.
The break-down products are found in low concentrations, and therefore should not be a hazard to the environment. Tebuthiuron is moderately mobile in soils. It can slowly leach or seep through some soils, and can pollute ground-water. Leaching does not usually carry tebuthiuron in the soil below 24 inches. Do not apply on ditches used to transport irrigation or potable water.