In studies with bromadiolone baits applied to soil, 45-78% of the bromadiolone broke down in the first 21 days. Some studies indicate that it may take longer to break down if stored underground by animals where it has less exposure to the weather. Bromadiolone has a low potential to move in soil. When it was tested in four different soil types, 95% was found in the upper three centimeters. However, it was more mobile in sandy soil. In water, a half life of 392 days has been reported. However, in some water conditions bromadiolone may not break down. Bromadiolone has a low potential to move up into the air.
Bromadiolone is not registered to be used near food. However, when it was applied to soil, only trace levels moved up into plants.