Oregon Revised Statutes Public Health and Safety § 468B.070

(a) Dump polluting substances into any public or private body of water that empties directly or indirectly into any navigable body of water in or adjacent to a municipality, except by permit issued by the Department of Environmental Quality.

(b) Dump polluting substances into any open dump or sanitary landfill where by drainage or seepage any navigable body of water in or adjacent to a municipality may be affected adversely unless:

(a) “Municipality” means any city having a population of 250,000 or more or any home-rule county having a population of 350,000 or more.

(b) “Polluting substances” means dead animal carcasses, excrement, and putrid, nauseous, noisome, decaying, deleterious or offensive substances including refuse of any kind or description.

(a) The municipality is operating a sanitary landfill in accordance with the terms and conditions of a valid permit;

(b) The commission finds the municipality is improving for other purposes each section of the landfill as it is completed; and

(c) The commission finds the municipality is continuously developing and implementing, where feasible, improvements in its solid waste disposal program that incorporate new and alternative methods, including recycling, reuse and resource recovery.