Under the Illinois Solid Waste Management Act, IEPA is required to publish an annual report on the remaining landfill capacity in Illinois. This is the fifth annual report published by the IEPA. It details data on volumes of waste accepted at landfills in each county, as well as the reported remaining landfill capacity by county and region. The number of active solid waste landfills in Illinois has gone from 146 in 1987, to 133 in 1988, to 126 in 1989, to 117 in 1990, to 110 in 1991. Solid waste accepted at these facilities in 1991 totalled 41.6 million cubic yards. The reported remaining landfill capacity was 360.9 million cubic yards. At current disposal volumes and capacities, Illinois has between eight and ten years of remaining landfill capacity if no further capacity is added.