Does used antifreeze endanger the environment?
Yes, pure ethylene glycol is toxic to aquatic and land based life forms. Fortunately, it will eventually break down into water and carbon dioxide. However, used antifreeze contains more than just ethylene/propylene glycols and water. Contaminants found in used antifreeze, such as lead and benzene, can cause serious health and environmental problems. Antifreeze manufacturers also add a variety of chemicals to antifreeze to inhibit rust and corrosion. These chemicals can endanger the environment. Large quantities of glycol can suffocate aquatic life and disrupt sewage treatment processes.
