 Ziram only moderately persists in soils, as it has a field half-life of 30 days
In water, ziram is the most stable of all metallic dithiocarbamate fungicides, which means degradation is rather slow.If ziram reaches the bottom of a body of water, it may stay there for months.The U.S. Environmental Protection Agency has concluded that ziram poses a low toxicity risk to mammals, a moderate risk to birds, and a high risk to aquatic species.