Oregon Thermal Discharges regulations & environmental compliance analysis

Oregon Thermal Discharges: What you need to know

Governing Law and Regulations

Temperature standards: Oregon Administrative Rules (OAR) 340-041-0028

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Criteria supporting salmon: OAR 340-041-0028(4)

Unidentified tributaries: OAR 340-041-0028(5)

Water temperature increases: OAR 340-041-0028(6) to 340-041-0028(8)

Cool water species: OAR 340-041-0028(9)

Borax Lake chub: OAR 340-041-0028(10)

Protecting cold waters: OAR 340-041-0028(11)

Implementation of the temperature criteria: OAR 340-041-0028(12)

Mixing zones: OAR 340-041-0053

Regulatory Agency

Oregon Department of Environmental Quality (DEQ) Water Quality Division

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Oregon is authorized by the U.S. Environmental Protection Agency (EPA) to administer the federal National Pollutant Discharge Elimination System (NPDES) permit program for wastewater discharges. See the state section NPDES PERMIT for additional information.

The water temperature and other water quality standards are controlled under the state's NPDES program and state Water Pollution Control Facility (WPCF) permit. See the national section THERMAL DISCHARGES for additional guidance.

Administration and enforcement. DEQ's Water Quality Division is responsible for administering and enforcing the state's criteria for thermal discharges and other water quality standards.

State Requirements


OAR 340-041-0028

The federal Clean Water Act requires each state to designate the beneficial uses of water and develop water quality standards that, when achieved, will protect those uses. Examples of beneficial uses include fish propagation, irrigation, and drinking water. States have ...

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