To prevent water pollution, do not mix, load, or use atrazine within 50 feet of any well or sink hole. Do not apply atrazine directly to water or wetlands. No information available. The effect of atrazine on microorganisms is small. Atrazine is toxic to many plants.
Resistant plants can metabolize or break down atrazine to compounds less toxic to plants.
Atrazine is moderately to slightly toxic to fish. Atrazine is slightly toxic to toxic to amphibian eggs and tadpoles. It is toxic to aquatic invertebrate animals. Atrazine and its formulations have not been tested for chronic effects in aquatic animals. Atrazine is slightly toxic to practically non-toxic to birds.