Department of Environmental Quality (DEQ) is responsible for protecting surface and groundwater to provide for a wide range of uses, including drinking water, recreation, fish habitat, aquatic life, and irrigation. The DEQ develops water quality standards, monitors water quality, and provides other services to control and monitor point and nonpoint source pollution. The DEQ also establishes Total Maximum Daily Loads (TMDLs) on water bodies that do not meet water quality standards. A TMDL identifies the amount of a pollutant that a water body can receive and still meet water quality standards. Throughout the 2021-2023 biennium, DEQ continued to develop and implement TMDLs. During this period, DEQ also developed water quality status and trend reports statewide. Water quality status and trend reports evaluate water quality standards attainment and trends using water quality monitoring data available in public databases. The results are used to support a number of water programs including DEQ’s review of Agricultural Water Quality Management Area plans and rules; and for assessment of progress implementing TMDLs.
During the most recent (2023-25) biennium at DEQ:
Watershed Restoration (TMDL) accomplishments, including successful implementation efforts by several designated management agencies (DMA’s). Examples of progress and notable efforts during 2023-25 include: i) working closely with the Washington Department of Ecology to develop implementation plans that effectively address the non-point source impacts of the mainstem Columbia River dams, ii) issuing the Powder River bacteria TMDL in July 2024; Yaquina bacteria TMDL in September 2023, Willamette mainstem & subbasins Temperature TMDLs effective May 2025, iii) coordinating with ODF & ODA on implementation plans for TMDLs for restoration efforts in watersheds such as the Willamette and Yaquina, and iv) preparing for a possible delisting of the Lower Willamette River bacteria impairment.
Support for NPS restoration efforts via 319 grants and Clean Water State Revolving Fund (CWSRF) funding. Examples include: i) a significant update and expansion of the Cottage Grove stormwater drainage and treatment master plan that will guide the city maintenance and improvement for the next 20 years, including implementation of BMPs for addressing emerging contaminants including 6PPD-quinone (SRF), ii) stormwater and street treelining project efforts along Powell Blvd in Gresham, which will be designed to capture and treat runoff from the existing roadway and infiltrate or filter the runoff before flowing into the nearby fish-bearing waters of Johnson Creek (SRF), iii) support for the North Fork Hubbard Creek Sediment Risk Reduction Plan that will address nonpoint source sedimentation risks in the Hubbard Creek watershed and help reduce sediment from reaching the North Fork Hubbard Creek and its tributaries (SRF), and iv) 319 grant support for the Fifteenmile Action to Stabilize Temperatures (FAST) Plan, an effort to improve stream flows and temperatures conditions for resident and migratory fish during critical periods in Fifteenmile Creek (matching funds are secured through the Recipient and the Oregon Watershed Enhancement Board).
DEQ and DLCD have, in partnership with other responsible agencies, completed drafting and submittal of Oregon’s Coastal Nonpoint Pollution Control Program Plan (CNPCP) to EPA/NOAA for their consideration and full approval. Since 2015, the plan has been disapproved, causing 30% reduction in penalties to the amount of federal funding allotted to two significant federal grants that support nonpoint source pollution reduction and watershed restoration efforts in Oregon. Multiple state agencies have been involved in addressing various CZARA management measures that were previously disapproved or received interim approval in years past but required additional effort to ensure full approval. Updated descriptions of our strategies for meeting these management measures were included in the updated plan, which was submitted to EPA/NOAA in July 2025. Once approved, the state anticipates restoration of full federal funding for Oregon’s CWA Section 319 and CZMA grant programs.
Every two years, DEQ creates the Integrated Report, a comprehensive evaluation of Oregon’s surface waters. In 2022, in consultation with a technical workgroup of oceanographic experts, DEQ developed methodologies to assess impairment of narrative water quality criteria relevant to marine waters: Oregon’s narrative biocriteria (ocean acidification assessment) and marine dissolved oxygen criteria (hypoxia assessment). Based on data submitted to the agency during the past three assessment cycles, identifying impacts of ocean acidification and hypoxia on fish and aquatic life, DEQ has proposed to list sections of marine waters as impaired for these conditions based on climate-change-related causes. By including these assessments in the Integrated Report, DEQ recognizes the impact of changing ocean conditions on plants and animals in the ocean. The Draft Integrated Report includes more information on this topic.
CRB Toxics Reduction Grants – DEQ began implementing multiple projects to protect the environment from toxic contaminants funded through a 5-year, $6 million Columbia River Basin Restoration Funding Program Toxic Reduction Lead Grant from the U.S. Environmental Protection Agency. The grant agreement involves four distinct project areas, including: 1) enhancements to Oregon’s Pesticide Stewardship Partnerships (PSP) Program, in partnership with ODA, aimed at keeping pesticides out of the aquatic environment through voluntary changes to pesticide use practices; 2) partnership efforts between DEQ and ODA to develop and implement effective strategies for reducing mercury contributions from agricultural land in key sub-basins covered under EPA's Willamette Basin Mercury Total Maximum Daily Load; 3) efforts to investigate and clean-up of contaminated land and/or groundwater at up to 10 distressed properties, allowing for the eventual redevelopment of the land to benefit communities; and 4) DEQ completion of an agency-wide PFAS Strategic Plan, which outlines a path forward to protect human health and the environment from PFAS exposure.
CRB Toxics Monitoring Grant - DEQ and partners developed a grant proposal in 2024 to improve the capacity to conduct toxics monitoring in the CR Basin. DEQ officially was awarded $900,000 in June 2025 to begin work on two studies: one involving the fate and transport of PFAS in biosolids applied to agricultural lands, and the other project will study emerging and legacy contaminants (e.g., PFAS, mercury and PCBs) in fish tissue.
Oregon Water Data Portal - Water-related data collection in Oregon represents a valuable statewide asset that can deliver greater benefits through improved coordination and integration across agencies and organizations. The Oregon Water Data Portal demonstrates potential for making Oregon's water data accessible from a single platform. Centralized data will improve water management decision-making, support more efficient use of public funds, and help the state address current and pending water challenges and opportunities. The portal project team has made significant progress over the last biennium. The pilot portal is already demonstrating substantial value by integrating datasets that were previously difficult to connect. Users can now explore relationships between data from multiple sources. The project has also fostered new collaboration between agencies, building relationships and trust across traditional boundaries. In the absence of dedicated funding during the 2025-27 biennium, project development progress will be paused while state agencies continue efforts to ensure that critical water data sets are collected and managed in a manner that will be compatible with a centralized data portal platform. The final report for the Oregon Water Data Portal Phase 2: Oregon Water Data Portal Phase 2: Final Report and Portal Recommendations is available here, and additional information on the project and pilot portal are available here.
6ppd- quinone - DEQ, in partnership with other state and local agencies, have established and been actively convening a workgroup to assess research and threats posed by 6ppd- quinone (toxic tire dust), and to track statewide and inter-state efforts to identify best management practices, policy developments and other solutions to address the risks native fish populations in Oregon.