A key to environmental excellence is blending green initiatives with low-cost energy where possible — and that’s what the Pima County (Ariz.) Regional Wastewater Reclamation Department (PCRWRD) has accomplished. “Treatment rates are one of the most important issues for our users, and if there’s any opportunity to reduce our costs we’ll definitely do it,” says deputy director Jackson Jenkins. The department operates two activated sludge plants and nine smaller facilities in and around the Tucson area. The main treatment operations include the Roger Road plant (41 mgd) and the Ina Road facility (37.5 mgd). Green initiatives range from a 32-year-old
