Abstract: A compact transportable water treatment system for treating water in a reservoir includes a batching unit having a chemical hopper for holding dissolvable chemicals and having a fluid inlet for delivery of fluid into the hopper for dissolving the chemicals to create a chemical solution and a fluid outlet in a lower portion of the chemical hopper for outflow of chemical solution. The batching unit further includes a fluid delivery system configured to deliver the fluid to the chemical hopper through the fluid inlet and a batching tank that receives and holds the chemical solution passing from the fluid outlet. A dosing unit comprising at least one dosing pump is configured to pump the chemical solution from the batching tank to a dosing line. A control unit controls operation of the dosing unit responsive to a chemical concentration of the water in the reservoir.