The following TMDLs have been approved by EPA, and appear on the Department's web site:
Columbia River -- Dioxin -- February 25, 1991
Columbia River -- Dissolved Gas -- November 11, 2002
Or. Admin. Code § 340-041-0103
Stat. Auth.: ORS 468.020, 468B.030, 468B.035 & 468B.048
Stats. Implemented: ORS 468B.030, 468B.035 & 468B.048