The wastewater treatment effort in Phoenix has kept pace through a combination of results-driven equipment upgrades — particularly its solids pumping function — and a renewed focus on equipment maintenance. On a daily basis, the 91st Avenue Wastewater Treatment Facility handles better than 150 million gallons of sewage, processes over two million gallons of sludge, and removes 100 dry tons of processed “cake” for sanitary landfill disposal.