Atrazine 🚨 Is Atrazine Depopulating America? What You Need to Know About This Chemical in Our Water Atrazine is one of the most widely used herbicides in the United States — and one of the most controversial. Found in approximately 63% of America’s water supply , this chemical has raised serious concerns among scientists, environmental researchers, and public health advocates. Despite being banned in Europe decades ago, atrazine continues to be heavily used across the U.S.,