The Clearstream Wastewater Treatment System is designed as an efficient, extended aeration sewage treatment plant. This system provides a proper environment for aerobic bacteria and other microorganisms to convert incoming sewage into clear, odorless and organically stable water. Test results taken from applications consistently fall below the U.S. EPA limits for direct discharge of treated effluent, according to the manufacturer. 800/586-3656; www.clearstreamsystems.com.