2015 ORS § 468B.080¹
Prohibitions relating to garbage or sewage dumping into waters of state

(1) No garbage or sewage shall be discharged into or in any other manner be allowed to enter the waters of the state from any building or structure unless such garbage or sewage has been treated or otherwise disposed of in a manner approved by the Department of Environmental Quality. All plumbing fixtures in buildings or structures, including prior existing plumbing fixtures from which waste water or sewage is or may be discharged, shall be connected to and all waste water or sewage from such fixtures in buildings or structures shall be discharged into a sewerage system, septic tank system or other disposal system approved by the department pursuant to ORS 448.305 (Special ordinance authority of certain cities), 454.010 (Definitions for ORS 454.010 to 454.040) to 454.040 (Determination of costs payable by users), 454.205 (Municipality defined) to 454.255 (Plans and cost estimates), 454.505 (Definitions for ORS 454.505 to 454.535) to 454.535 (Sewage Treatment Works Construction Account) and 454.605 (Definitions for ORS 454.605 to 454.755) to 454.755 (Fees for certain reports on sewage disposal) and ORS chapters 468, 468A and 468B.

(2) The department may extend the time of compliance for any person, class of persons, municipalities or businesses upon such conditions as it may deem necessary to protect the public health and welfare if it is found that strict compliance would be unreasonable, unduly burdensome or impractical due to special physical conditions or cause or because no other alternative facility or method of handling is yet available. [Formerly 449.150 [bad link] and then 468.770]