A portable or fixed vehicle wash system that includes a collection tank having a floor and an opening. The wash system further includes a vehicle drive platform positioned above at least a portion of the opening of the collection tank. A water jet delivery system is positioned directly under the drive platform for delivering a cleansing amount of water to the vehicle. A two stage separation system that has a collection surface positioned beneath the drive platform, is in communication with the collection tank for depositing the collected water. The two stage separation system has a first large debris removal system and a second fine debris removal system. The first large debris removal system collects large debris from the collected water for removal from the collection tank, and the second fine debris removal system collects small debris suspended in the collected water after the collected water moves from the first large debris removal system to the second fine debris removal system.