Linear programming is one of the operation research techniques to optimize certain cases. In terms of the environment, one application of programming is the case of the disposal of industrial waste into the rivers. This programming is a tool for making waste disposal decisions by considering the interests of many parties. In this linear programming, industrial interests become "objective functions", namely "Minimize the amount of reduced pollution load" with 28 equations as constraints including ten constraints related to stream standards, nine constraints related to effluent standards, and nine constraints related to the efficiency of wastewater treatment plants. The results of linear programming modeling show optimal conditions, i.e. the level of wastewater treatment that must be done by each industry before being discharged into the river so that the river is not polluted