Model forecasts of atrazine in Lake Michigan in response to various sensitivity and potential management scenarios

► Atrazine is decaying very slowly in Lake Michigan at a rate of 0.009/year. ► Kinetic half-life of atrazine in Lake Michigan is approximately 77 years. ► Atrazine lake concentrations are expected to increase to approximately 67 ng/L by year 2157 ► Lake-averaged forecasted concentrations of atrazine are below water quality criteria.