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The rules tables and maps found in the Oregon Administrative Rules Chapter 340, Division 41 constitute Oregon’s water quality standards. These rules include the designated beneficial uses of Oregon waters, water quality criteria, Oregon’s antidegradation policy, and related implementation provisions. Although some criteria are incorporated into tables (links provided below), it is important to read the water quality standards rule language in Division 41 for complete information. Additional tables and maps identify where beneficial uses, such as aquatic life, recreation, and drinking water supplies, are designated for purposes of applying the water quality criteria. DEQ has developed designated beneficial use tables and maps for each of 15 administrative basins that cover the state.
Water quality standards, criteria and policies
Water Pollution State-Wide Water Quality Maintenance Plan; Beneficial Uses, Policies, Standards, and Treatment Criteria for Oregon Division 41
Designated beneficial use tables
These tables identify the beneficial uses that have been designated in each basin.
Deschutes Basin Designated Beneficial Uses (OAR 340-041-0130) Division 41: Water Quality Standards - Table 130A
Goose and Summer Lakes Basin Designated Beneficial Uses (OAR 340-041-0140) Division 41: Water Quality Standards - Table 140A
Grande Ronde Basin Designated Beneficial Uses (OAR 340-041-0151) Division 41: Water Quality Standards - Table 151A
Hood Basin Designated Beneficial Uses (OAR 340-041-0160) Division 41: Water Quality Standards - Table 160A
John Day Basin Designated Beneficial Uses (OAR 340-041-0170) Division 41: Water Quality Standards - Table 170A
Klamath Basin Designated Beneficial Uses (OAR 340-041-0180) Division 41: Water Quality Standards - Table 180A
Mainstem Columbia River Designated Beneficial Uses (OAR 340-041-0101) Division 41: Water Quality Standards - Table 101A
Mainstem Snake River Designated Beneficial Uses (OAR 340-041-0121) Division 41: Water Quality Standards - Table 121A
Malheur Lake Basin Designated Beneficial Uses (OAR 340-041-0190) Division 41: Water Quality Standards - Table 190A
Malheur River Basin Designated Beneficial Uses (OAR 340-041-0201) Division 41: Water Quality Standards - Table 201A
Mid Coast Basin Designated Beneficial Uses (OAR 340-041-0220) Division 41: Water Quality Standards - Table 220A
North Coast Basin Designated Beneficial Uses (OAR 340-041-0230) Division 41: Water Quality Standards - Table 230A
Owyhee Basin Designated Beneficial Uses (OAR 340-041-0250) Division 41: Water Quality Standards - Table 250A
Powder/Burnt Basin Designated Beneficial Uses (OAR 340-041-0260) Division 41: Water Quality Standards - Table 260A
Rogue Basin Designated Beneficial Uses (OAR 340-041-0271) Division 41: Water Quality Standards - Table 271A
Sandy Basin Designated Beneficial Uses (OAR 340-041-0286) Division 41: Water Quality Standards - Table 286A
South Coast Basin Designated Beneficial Uses (OAR 340-041-0300) Division 41: Water Quality Standards - Table 300A
Umatilla Basin Designated Beneficial Uses (OAR 340-041-0310) Division 41: Water Quality Standards - Table 310A
Umpqua Basin Designated Beneficial Uses (OAR 340-041-0320) Division 41: Water Quality Standards - Table 320A
Walla Walla Basin Designated Beneficial Uses (OAR 340-041-0330) Division 41: Water Quality Standards - Table 330A
Willamette Basin Designated Beneficial Uses (OAR 340-041-0340) Division 41: Water Quality Standards - Table 340A
Fish use designation maps and tables
These maps and tables show waters where specific fish uses are designated, including the following aquatic life use subcategories: Borax Lake Chub, Bull Trout Spawning and Juvenile Rearing, Cool Water Species, Core Cold Water Habitat, Salmon and Steelhead Migration Corridors, Salmon and Trout Rearing and Migration, Redband or Lahontan Cutthroat Trout, Redband and Hybrid Trout, and Shad and Sturgeon Spawning and Rearing. The tables for the Mainstem Columbia River and Mainstem Snake River also indicate areas where salmon and steelhead spawning through fry emergence occur. These uses are protected by temperature criteria at OAR 340-041-0028 and inform application of dissolved oxygen criteria at OAR 340-041-0016.
Fish Use Designations - Deschutes Basin
Fish Use Designations - Goose and Summer Lakes Basin Division 41: Water Quality Standards - Table 140B
Fish Use Designations - Grande Ronde Basin Division 41: Water Quality Standards - Figure 151A
Fish Use Designations - Hood Basin Division 41: Water Quality Standards - Figure 160A
Fish Use Designations - John Day Basin Division 41: Water Quality Standards - Figure 170A
Fish Use Designations - Klamath Basin Division 41: Water Quality Standards - Figure 180A
Fish Use Designations - Mainstem Columbia River Division 41: Water Quality Standards - Table 101B
Fish Use Designations - Mainstem Snake River Division 41: Water Quality Standards - Table 121B
Fish Use Designations - Malheur Lake Basin Division 41: Water Quality Standards - Table 190B
Fish Use Designations - Owyhee Basin Division 41: Water Quality Standards - Table 250B
Fish Use Designations Malheur River Basin Division 41: Water Quality Standards - Figure 201A
Fish Use Designations Mid Coast Basin Division 41: Water Quality Standards - Figure 220A
Fish Use Designations North Coast Basin Division 41: Water Quality Standards - Figure 230A
Fish Use Designations Powder Basin Division 41: Water Quality Standards - Figure 260A
Fish Use Designations Rogue Basin Division 41: Water Quality Standards - Figure 271A
Fish Use Designations Sandy Basin Division 41: Water Quality Standards - Figure 286A
Fish Use Designations South Coast Basin Division 41: Water Quality Standards - Figure 300A
Fish Use Designations Umatilla Basin Division 41: Water Quality Standards - Figure 310A
Fish Use Designations Umpqua Basin Division 41: Water Quality Standards - Figure 320A
Fish Use Designations Willamette Basin Division 41: Water Quality Standards - Figure 340A
Salmon and steelhead spawning use designations
The following maps specify in which streams and at what times salmon and steelhead spawning is a designated use. This use is protected under specific water quality criteria for temperature (340-041-0028) and dissolved oxygen (34-041-0016).
Salmon and Steelhead Spawning Use Designations Deschutes Basin Division 41: Water Quality Standards - Figure 130B
Salmon and Steelhead Spawning Use Designations Grande Ronde Basin Division 41: Water Quality Standards - Figure 151B
Salmon and Steelhead Spawning Use Designations Hood Basin Division 41: Water Quality Standards - Figure 160B
Salmon and Steelhead Spawning Use Designations John Day Basin Division 41: Water Quality Standards - Figure 170B
Salmon and Steelhead Spawning Use Designations Mid Coast Basin Division 41: Water Quality Standards - Figure 220B
Salmon and Steelhead Spawning Use Designations North Coast Basin Division 41: Water Quality Standards - Figure 230B
Salmon and Steelhead Spawning Use Designations Rogue Basin Division 41: Water Quality Standards - Figure 271B
Salmon and Steelhead Spawning Use Designations Sandy Basin Division 41: Water Quality Standards - Figure 286B
Salmon and Steelhead Spawning Use Designations South Coast Basin Division 41: Water Quality Standards - Figure 300B
Salmon and Steelhead Spawning Use Designations Umatilla Basin Division 41: Water Quality Standards - Figure 310B
Salmon and Steelhead Spawning Use Designations Umpqua Basin Division 41: Water Quality Standards - Figure 320B
Salmon and Steelhead Spawning Use Designations Willamette Basin Division 41: Water Quality Standards - Figure 340B
Coastal contact recreation and shellfish harvesting designations
For questions about DEQ's administrative rules, contact Emil Hnidey, Rule Coordinator, at 800-452-4011, ext. 5946 or 503-229-5946
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