Mahwah, N.J.-based Turnkey Solutions Inc. offers custom wastewater treatment systems in a cargo box. The treatment systems can be built in a 20-foot or 40-foot long box. Multiple box systems are also available. In addition to the custom water treatment system, the boxes can come equipped with lights, heat and ventilation and power distribution. The cargo box approach eliminates the need to construct a building or an addition to house the water treatment system.