The City of Gresham, Oregon has reached a much-anticipated milestone: its wastewater treatment plant has achieved net-zero status. Through a combination of anaerobic digesters and a CHP unit, the plant now runs entirely on energy that it produces itself. This project was a winner of CESA's 2014 State Leadership in Clean Energy Awards, and is supported by CESA members the Energy Trust of Oregon and the Oregon Department of Energy. For more about the Gresham wastewater treatment plant's net-zero achievement, click here and here.