Over the past year we have been working with Norwalk Wastewater Treatment Company (Norweco) and their Singulair Green® TNT (total nitrogen treatment system) aerobic treatment unit. To summarize: I'm impressed! We have sold and installed eight of these units on some challenging sites that had been previously denied a septic permit and they are performing excellently! The Norweco Singulair Green® TNT units are capable of treating flows up to 600 gallons per day and are an exce