Oregon Administrative Code

340-041-0145 Basin-Specific Criteria (Goose and Summer Lakes): Water Quality Standards and Policies for this Basin (1) pH (hydrogen ion concentration): (a) Goose Lake: pH values may not fall outside the range of 7.5 to 9.5; (b) All other basin waters. pH values may not fall outsi…

340-041-0151 Basin-Specific Criteria (Grande Ronde): Beneficial Uses to Be Protected in the Grande Ronde Basin [Note: The amended beneficial uses designated in this rule, adopted by the Environmental Quality Commission on November 16, 2023, are not applicable for Clean Water Act …

340-041-0154 Basin-Specific Criteria (Grande Ronde): Approved TMDLs in the Basin: The following TMDLs have been approved by EPA, and appear on the Department’s web site: Upper Grande Ronde — Temperature, Sediment, Nitrogen and Phosphorous — May 3, 2000 Statutory/Other Authority: …

340-041-0156 Basin-Specific Criteria (Grande Ronde): Water Quality Standards and Policies for this Basin (1) pH (hydrogen ion concentration). pH values may not fall outside the following range: all basin streams (other than main stem Snake River): 6.5–9.0. When greater than 25 pe…

340-041-0160 Basin-Specific Criteria (Hood): Beneficial Uses to Be Protected in the Hood Basin [Note: The amended beneficial uses designated in this rule, adopted by the Environmental Quality Commission on November 16, 2023, are not applicable for Clean Water Act purposes until a…

340-041-0164 Basin-Specific Criteria (Hood): Approved TMDLs in the Basin: The following TMDLs have been approved by EPA, and appear on the Department’s web site: Western Hood — Temperature — January 30, 2002 Statutory/Other Authority: ORS 468.020, 468B.030, 468B.035 & 468B.048 St…

340-041-0165 Basin-Specific Criteria (Hood): Water Quality Standards and Policies for this Basin (1) pH (hydrogen ion concentration). pH values may not fall outside the following ranges: (a) Hood River Basin streams (except main stem Columbia River and Cascade lakes): pH values m…

340-041-0170 Basin-Specific Criteria (John Day): Beneficial Uses to Be Protected in the John Day Basin [Note: The amended beneficial uses designated in this rule, adopted by the Environmental Quality Commission on November 16, 2023, are not applicable for Clean Water Act purposes…

340-041-0174 Basin-Specific Criteria (John Day): Approved TMDLs in the Basin: The following TMDLs have been approved by EPA, and appear on the Department’s web site: None. Statutory/Other Authority: ORS 468.020, 468B.030, 468B.035 & 468B.048 Statutes/Other Implemented: ORS 468B.0…

340-041-0175 Basin-Specific Criteria (John Day): Water Quality Standards and Policies for this Basin (1) pH (hydrogen ion concentration). pH values may not fall outside the following range: all Basin streams (other than the main stem Colombia River): 6.5–9.0. When greater than 25…

340-041-0180 Basin-Specific Criteria (Klamath): Beneficial Uses to Be Protected in the Klamath Basin [Note: The amended beneficial uses designated in this rule, adopted by the Environmental Quality Commission on November 16, 2023, are not applicable for Clean Water Act purposes u…

340-041-0184 Basin-Specific Criteria (Klamath): Approved TMDLs in the Basin: The following TMDLs have been approved by EPA, and appear on the Department’s web site: Upper Klamath Lake Drainage — Temperature, Dissolved Oxygen, pH, Chlorophyll a — August 7, 2002. Statutory/Other Au…

340-041-0185 Basin-Specific Criteria (Klamath): Water Quality Standards and Policies for this Basin (1) pH (hydrogen ion concentration). pH values may not fall outside the following ranges: (a) Fresh waters except Cascade lakes: pH values may not fall outside the range of 6.5-9.0…

340-041-0190 Basin-Specific Criteria (Malheur Lake): Beneficial Uses to Be Protected in the Malheur Lake Basin [Note: The amended beneficial uses designated in this rule, adopted by the Environmental Quality Commission on November 16, 2023, are not applicable for Clean Water Act …

340-041-0194 Basin-Specific Criteria (Malheur Lake): Approved TMDLs in the Basin: The following TMDLs have been approved by EPA, and appear on the Department’s web site: None. Statutory/Other Authority: ORS 468.020, 468B.030, 468B.035 & 468B.048 Statutes/Other Implemented: ORS 46…

340-041-0195 Basin-Specific Criteria (Malheur Lake): Water Quality Standards and Policies for this Basin (1) pH (hydrogen ion concentration). pH values may not fall outside the range of 7.0 to 9.0. When greater than 25 percent of ambient measurements taken between June and Septem…

340-041-0201 Basin-Specific Criteria (Malheur River): Beneficial Uses to Be Protected in the Malheur River Basin [Note: The amended beneficial uses designated in this rule, adopted by the Environmental Quality Commission on November 16, 2023, are not applicable for Clean Water Ac…

340-041-0204 Basin-Specific Criteria (Malheur River): Approved TMDLs in the Basin: The following TMDLs have been approved by EPA, and appear on the Department’s web site: None. Statutory/Other Authority: ORS 468.020, 468B.030, 468B.035 & 468B.048 Statutes/Other Implemented: ORS 4…

340-041-0207 Basin-Specific Criteria (Malheur River): Water Quality Standards and Policies for this Basin (1) pH (hydrogen ion concentration). pH values may not fall outside the range of 7.0 to 9.0. When greater than 25 percent of ambient measurements taken between June and Septe…

340-041-0220 Basin-Specific Criteria (Mid Coast Basin): Beneficial Uses to Be Protected in the Mid Coast Basin [Note: The amended beneficial uses designated in this rule, adopted by the Environmental Quality Commission on November 16, 2023, are not applicable for Clean Water Act …

340-041-0224 Basin-Specific Criteria (Mid Coast Basin): Approved TMDLs in the Basin: The following TMDLs have been approved by EPA, and appear on the Department’s web site: Clear Lake — Phosphorus — December 8, 1992 Statutory/Other Authority: ORS 468.020, 468B.030, 468B.035 & 468…

340-041-0225 Basin-Specific Criteria (Mid Coast Basin): Water Quality Standards and Policies for this Basin (1) pH (hydrogen ion concentration). pH values may not fall outside the following ranges: (a) Marine waters: 7.0–8.5; (b) Estuarine and fresh waters: 6.5–8.5. (2) Total Dis…

340-041-0230 Basin-Specific Criteria (North Coast): Beneficial Uses to Be Protected in the North Coast Basin [Note: The amended beneficial uses designated in this rule, adopted by the Environmental Quality Commission on November 16, 2023, are not applicable for Clean Water Act pu…

340-041-0234 Basin-Specific Criteria (North Coast): Approved TMDLs in the Basin: The following TMDLs have been approved by EPA, and appear on the Department’s web site: Nestucca Bay Drainage — Temperature, Bacteria and Sediment — May 13, 2002 Tillamook Bay Drainage — Temperature …

340-041-0235 Basin-Specific Criteria (North Coast): Water Quality Standards and Policies for this Basin (1) pH (hydrogen ion concentration). pH values may not fall outside the following ranges: (a) Marine waters: 7.0–8.5; (b) Estuarine and fresh waters: 6.5–8.5. (2) Total Dissolv…

340-041-0250 Basin-Specific Criteria (Owyhee): Beneficial Uses to Be Protected in the Owyhee Basin [Note: The amended beneficial uses designated in this rule, adopted by the Environmental Quality Commission on November 16, 2023, are not applicable for Clean Water Act purposes unt…

340-041-0254 Basin-Specific Criteria (Owyhee): Approved TMDLs in the Basin: The following TMDLs have been approved by EPA, and appear on the Department’s web site: None. Statutory/Other Authority: ORS 468.020, 468B.030, 468B.035 & 468B.048 Statutes/Other Implemented: ORS 468B.030…

340-041-0256 Basin-Specific Criteria (Owyhee): Water Quality Standards and Policies for this Basin (1) pH (hydrogen ion concentration). pH values may not fall outside the range of 7.0 to 9.0. When greater than 25 percent of ambient measurements taken between June and September ar…

340-041-0260 Basin-Specific Criteria (Powder/Burnt): Beneficial Uses to Be Protected in the Powder/Burnt Basins [Note: The amended beneficial uses designated in this rule, adopted by the Environmental Quality Commission on November 16, 2023, are not applicable for Clean Water Act…

340-041-0264 Basin-Specific Criteria (Powder/Burnt): Approved TMDLs in the Basin: The following TMDLs have been approved by EPA, and appear on the Department’s web site: None. Statutory/Other Authority: ORS 468.020, 468B.030, 468B.035 & 468B.048 Statutes/Other Implemented: ORS 46…

340-041-0265 Basin-Specific Criteria (Powder/Burnt): Water Quality Standards and Policies for this Basin (1) pH (hydrogen ion concentration). pH values may not fall outside the following range: all Basin streams (other than main stem Snake River): 6.5–9.0. When greater than 25 pe…

340-041-0271 Basin-Specific Criteria (Rogue): Beneficial Uses to Be Protected in the Rogue Basin [Note: The amended beneficial uses designated in this rule, adopted by the Environmental Quality Commission on November 16, 2023, are not applicable for Clean Water Act purposes until…

340-041-0274 Basin-Specific Criteria (Rogue): Approved TMDLs in the Basin: The following TMDLs have been approved by EPA, and appear on the Department’s web site: Bear Creek — Ammonia, BOD and Phosphorus — December 8, 1992 Lobster Creek — Temperature — June 13, 2002 Lower Sucker …

340-041-0275 Basin-Specific Criteria (Rogue): Water Quality Standards and Policies for this Basin (1) pH (hydrogen ion concentration). pH values may not fall outside the following ranges: (a) Marine waters: 7.0–8.5; (b) Estuarine and fresh waters (except Cascade lakes): 6.5–8.5; …

340-041-0286 Basin-Specific Criteria (Sandy Basin): Beneficial Uses to Be Protected in the Sandy Basin [Note: The amended beneficial uses designated in this rule, adopted by the Environmental Quality Commission on November 16, 2023, are not applicable for Clean Water Act purposes…

340-041-0289 Basin-Specific Criteria (Sandy Basin): Approved TMDLs in the Basin: The following TMDLs have been approved by EPA, and appear on the Department’s web site: None. Statutory/Other Authority: ORS 468.020, 468B.030, 468B.035 & 468B.048 Statutes/Other Implemented: ORS 468…

340-041-0290 Basin-Specific Criteria (Sandy Basin): Water Quality Standards and Policies for this Basin (1) pH (hydrogen ion concentration). pH values may not fall outside the following ranges: (a) All Basin waters (except main stem Columbia River and Cascade lakes): pH values ma…

340-041-0300 Basin-Specific Criteria (South Coast): Beneficial Uses to Be Protected in the South Coast Basin [Note: The amended beneficial uses designated in this rule, adopted by the Environmental Quality Commission on November 16, 2023, are not applicable for Clean Water Act pu…

340-041-0304 Basin-Specific Criteria (South Coast): Approved TMDLs in the Basin The following TMDLs have been approved by EPA, and appear on the Department’s web site: Coquille — BOD — July 3, 1996 Upper South Fork of the Coquille — Temperature — March 23, 2001 Statutory/Other Au…

340-041-0305 Water Quality Standards and Policies for South Coast Basin (1) pH (Hydrogen ion concentration) pH values may not fall outside the following ranges: (a) Estuarine and fresh waters: 6.5-8.5. (b) Marine waters: 7.0-8.5. (2) Total Dissolved Solids. Guide concentrations l…

340-041-0310 Basin-Specific Criteria (Umatilla): Beneficial Uses to Be Protected in the Umatilla Basin [Note: The amended beneficial uses designated in this rule, adopted by the Environmental Quality Commission on November 16, 2023, are not applicable for Clean Water Act purposes…

340-041-0314 Basin-Specific Criteria (Umatilla): Approved TMDLs in the Basin: The following TMDLs have been approved by EPA, and appear on the Department’s web site: Umatilla River Basin — Temperature, pH, Sediment, Turbidity, Aquatic Weeds, and Algae — May 9, 2001 Statutory/Othe…

340-041-0315 Basin-Specific Criteria (Umatilla): Water Quality Standards and Policies for this Basin (1) pH (hydrogen ion concentration). pH values may not fall outside the following range: all Basin streams except the main stem Columbia River and the “constructed channel” segmen…

340-041-0320 Basin-Specific Criteria (Umpqua Basin): Beneficial Uses to Be Protected in the Umpqua Basin [Note: The amended beneficial uses designated in this rule, adopted by the Environmental Quality Commission on November 16, 2023, are not applicable for Clean Water Act purpos…

340-041-0324 Basin-Specific Criteria (Umpqua Basin): Approved TMDLs in the Basin: The following TMDLs have been approved by EPA, and appear on the Department’s web site: Little River — Temperature, pH and Sediment — January 29, 2002 Statutory/Other Authority: ORS 468.020, 468B.03…

340-041-0326 Basin-Specific Criteria (Umpqua Basin): Water Quality Standards and Policies for this Basin (1) pH (hydrogen ion concentration). pH values may not fall outside the following ranges: (a) Marine waters: 7.0–8.5; (b) Estuarine and fresh waters (except Cascade lakes): 6.…

340-041-0330 Basin-Specific Criteria (Walla Walla): Beneficial Uses to Be Protected in the Walla Walla Basin [Note: The amended beneficial uses designated in this rule, adopted by the Environmental Quality Commission on November 16, 2023, are not applicable for Clean Water Act pu…

340-041-0334 Basin-Specific Criteria (Walla Walla): Approved TMDLs in the Basin: The following TMDLs have been approved by EPA, and appear on the Department’s web site: None. Statutory/Other Authority: ORS 468.020, 468B.030, 468B.035 & 468B.048 Statutes/Other Implemented: ORS 468…

340-041-0336 Basin-Specific Criteria (Walla Walla): Water Quality Standards and Policies for this Basin (1) pH (hydrogen ion concentration). pH values may not fall outside the range of 6.5 to 9.0. When greater than 25 percent of ambient measurements taken between June and Septemb…

340-041-0340 Basin-Specific Criteria (Willamette): Beneficial Uses to Be Protected in the Willamette Basin [Note: The amended beneficial uses designated in this rule, adopted by the Environmental Quality Commission on November 16, 2023, are not applicable for Clean Water Act purp…